TY  - JOUR
AU  - Godiya, Chirag B.
AU  - Marcantoni, Enrico
AU  - Dunjić, Branko
AU  - Tomić, Miloš
AU  - Nikolić, Marija
AU  - Maletaškić, Jelena
AU  - Đonlagić, Jasna
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/15
AB  - Poly(methyl methacrylate) (PMMA)/clay nanocomposites (NCs) were prepared by suspension polymerization of methyl methacrylate in the presence of two different organoclays (Cloisite 30B, Cloisite 15A) with clay loading ranged from 0.5 to 5 wt%. Increase in molecular weight of the PMMA matrix with addition of the clay was revealed by gel permeation chromatography (GPC) and intrinsic viscosity measurements. As confirmed by X-ray diffraction (XRD), the NCs had an intercalated structure. The organoclays-MMA/PMMA compatibility was investigated by swelling tests and solubility parameter approach. Rheological behavior of PMMA NCs in molten state was analyzed through construction of master curves of complex viscosity, storage, and loss modulus by applying the time-temperature superposition procedure. Melt rheology, scanning electron microscopy (SEM), and UV/Vis spectroscopy results confirmed higher extent of clay dispersion in the NCs with Cloisite 30B. Compared to pure PMMA, all these NCs show increase of glass transition temperature as measured by DSC and improved thermal stability determined by thermogravimetric analysis (TGA). The results obtained by dynamic mechanical analysis showed that the storage modulus of the NCs was higher by incorporation of clay into the PMMA matrix, increasing as the amount of clay increased and that their mechanical performance was significantly enhanced.
PB  - Springer, New York
T2  - Polymer Bulletin
T1  - Effect of organoclay modifier structure on the viscoelastic and thermal properties of poly(methyl methacrylate)/organoclay nanocomposites
EP  - 2932
IS  - 6
SP  - 2911
VL  - 78
DO  - 10.1007/s00289-020-03248-7
ER  - 

@article{
author = "Godiya, Chirag B. and Marcantoni, Enrico and Dunjić, Branko and Tomić, Miloš and Nikolić, Marija and Maletaškić, Jelena and Đonlagić, Jasna",
year = "2021",
abstract = "Poly(methyl methacrylate) (PMMA)/clay nanocomposites (NCs) were prepared by suspension polymerization of methyl methacrylate in the presence of two different organoclays (Cloisite 30B, Cloisite 15A) with clay loading ranged from 0.5 to 5 wt%. Increase in molecular weight of the PMMA matrix with addition of the clay was revealed by gel permeation chromatography (GPC) and intrinsic viscosity measurements. As confirmed by X-ray diffraction (XRD), the NCs had an intercalated structure. The organoclays-MMA/PMMA compatibility was investigated by swelling tests and solubility parameter approach. Rheological behavior of PMMA NCs in molten state was analyzed through construction of master curves of complex viscosity, storage, and loss modulus by applying the time-temperature superposition procedure. Melt rheology, scanning electron microscopy (SEM), and UV/Vis spectroscopy results confirmed higher extent of clay dispersion in the NCs with Cloisite 30B. Compared to pure PMMA, all these NCs show increase of glass transition temperature as measured by DSC and improved thermal stability determined by thermogravimetric analysis (TGA). The results obtained by dynamic mechanical analysis showed that the storage modulus of the NCs was higher by incorporation of clay into the PMMA matrix, increasing as the amount of clay increased and that their mechanical performance was significantly enhanced.",
publisher = "Springer, New York",
journal = "Polymer Bulletin",
title = "Effect of organoclay modifier structure on the viscoelastic and thermal properties of poly(methyl methacrylate)/organoclay nanocomposites",
pages = "2932-2911",
number = "6",
volume = "78",
doi = "10.1007/s00289-020-03248-7"
}

Godiya, C. B., Marcantoni, E., Dunjić, B., Tomić, M., Nikolić, M., Maletaškić, J.,& Đonlagić, J.. (2021). Effect of organoclay modifier structure on the viscoelastic and thermal properties of poly(methyl methacrylate)/organoclay nanocomposites. in Polymer Bulletin
Springer, New York., 78(6), 2911-2932.
https://doi.org/10.1007/s00289-020-03248-7

Godiya CB, Marcantoni E, Dunjić B, Tomić M, Nikolić M, Maletaškić J, Đonlagić J. Effect of organoclay modifier structure on the viscoelastic and thermal properties of poly(methyl methacrylate)/organoclay nanocomposites. in Polymer Bulletin. 2021;78(6):2911-2932.
doi:10.1007/s00289-020-03248-7 .

Godiya, Chirag B., Marcantoni, Enrico, Dunjić, Branko, Tomić, Miloš, Nikolić, Marija, Maletaškić, Jelena, Đonlagić, Jasna, "Effect of organoclay modifier structure on the viscoelastic and thermal properties of poly(methyl methacrylate)/organoclay nanocomposites" in Polymer Bulletin, 78, no. 6 (2021):2911-2932,
https://doi.org/10.1007/s00289-020-03248-7 . .

TY  - JOUR
AU  - Tomić, Miloš
AU  - Dunjić, Branko
AU  - Nikolić, Marija
AU  - Trifković, Kata T.
AU  - Stanković, Nadežda
AU  - Pavlović, Vladimir B.
AU  - Bajat, Jelena
AU  - Đonlagić, Jasna
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4262
AB  - In the present study the commercial multifunctional fatty acid polyamidoamine (PAA) was for the first time simultaneously applied as a curing agent and clay modifier for epoxy/clay nanocomposites (NC) based on diglycidyl ether of bisphenol A. The montmorillonite (Cloisite (R) Na+) was modified with different quantities of partially and fully protonated polyamidoamine. The NCs with 0.5 wt% novel organoclay were prepared by solution intercalation method. The major aims of this paper are investigations of the effects of the composition of PAA modified clays on structure, mechanical, barrier properties and corrosion stability on steel substrates of NCs were studied. The thermogravimetric, flame photometry and X-ray diffraction analyses confirmed the efficient modification of clay surface with polyamidoamine, predominantly located within layers. The NCs exhibited an intercalated/exfoliated morphology and the presence of free amino groups and increased content of modifier facilitated dispersion of clay particles within the polymer matrix, as shown by electron microscopy techniques (SEM, TEM). Under an optimized loading of PAA (molar quantity of total amino groups per clay cation exchange capacity of 1.75), the layers in stacks were separated by 5.0 nm and high number of individual layers was present in NC. Clay modified by PAA with free amino groups showed increased storage modulus in the rubbery state, glass transition temperature of NCs, while dumping factor was decreased. The tensile test confirmed that introduction of flexible modifier on the epoxy/clay interface lead to increase in the ultimate tensile strenght and elongation at break by 31% and toughness up to 83%. The electrochemical impedance spectroscopy and permeability tests proved the pronounced barrier effect of clay particles against corrosive species and water vapor when high dispersion degree of clay in NC was achieved.
PB  - Elsevier Science Sa, Lausanne
T2  - Progress in Organic Coatings
T1  - Polyamidoamine as a clay modifier and curing agent in preparation of epoxy nanocomposites
EP  - 321
SP  - 311
VL  - 131
DO  - 10.1016/j.porgcoat.2019.02.037
ER  - 

@article{
author = "Tomić, Miloš and Dunjić, Branko and Nikolić, Marija and Trifković, Kata T. and Stanković, Nadežda and Pavlović, Vladimir B. and Bajat, Jelena and Đonlagić, Jasna",
year = "2019",
abstract = "In the present study the commercial multifunctional fatty acid polyamidoamine (PAA) was for the first time simultaneously applied as a curing agent and clay modifier for epoxy/clay nanocomposites (NC) based on diglycidyl ether of bisphenol A. The montmorillonite (Cloisite (R) Na+) was modified with different quantities of partially and fully protonated polyamidoamine. The NCs with 0.5 wt% novel organoclay were prepared by solution intercalation method. The major aims of this paper are investigations of the effects of the composition of PAA modified clays on structure, mechanical, barrier properties and corrosion stability on steel substrates of NCs were studied. The thermogravimetric, flame photometry and X-ray diffraction analyses confirmed the efficient modification of clay surface with polyamidoamine, predominantly located within layers. The NCs exhibited an intercalated/exfoliated morphology and the presence of free amino groups and increased content of modifier facilitated dispersion of clay particles within the polymer matrix, as shown by electron microscopy techniques (SEM, TEM). Under an optimized loading of PAA (molar quantity of total amino groups per clay cation exchange capacity of 1.75), the layers in stacks were separated by 5.0 nm and high number of individual layers was present in NC. Clay modified by PAA with free amino groups showed increased storage modulus in the rubbery state, glass transition temperature of NCs, while dumping factor was decreased. The tensile test confirmed that introduction of flexible modifier on the epoxy/clay interface lead to increase in the ultimate tensile strenght and elongation at break by 31% and toughness up to 83%. The electrochemical impedance spectroscopy and permeability tests proved the pronounced barrier effect of clay particles against corrosive species and water vapor when high dispersion degree of clay in NC was achieved.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Progress in Organic Coatings",
title = "Polyamidoamine as a clay modifier and curing agent in preparation of epoxy nanocomposites",
pages = "321-311",
volume = "131",
doi = "10.1016/j.porgcoat.2019.02.037"
}

Tomić, M., Dunjić, B., Nikolić, M., Trifković, K. T., Stanković, N., Pavlović, V. B., Bajat, J.,& Đonlagić, J.. (2019). Polyamidoamine as a clay modifier and curing agent in preparation of epoxy nanocomposites. in Progress in Organic Coatings
Elsevier Science Sa, Lausanne., 131, 311-321.
https://doi.org/10.1016/j.porgcoat.2019.02.037

Tomić M, Dunjić B, Nikolić M, Trifković KT, Stanković N, Pavlović VB, Bajat J, Đonlagić J. Polyamidoamine as a clay modifier and curing agent in preparation of epoxy nanocomposites. in Progress in Organic Coatings. 2019;131:311-321.
doi:10.1016/j.porgcoat.2019.02.037 .

Tomić, Miloš, Dunjić, Branko, Nikolić, Marija, Trifković, Kata T., Stanković, Nadežda, Pavlović, Vladimir B., Bajat, Jelena, Đonlagić, Jasna, "Polyamidoamine as a clay modifier and curing agent in preparation of epoxy nanocomposites" in Progress in Organic Coatings, 131 (2019):311-321,
https://doi.org/10.1016/j.porgcoat.2019.02.037 . .

TY  - JOUR
AU  - Tomić, Miloš
AU  - Dunjić, Branko
AU  - Nikolić, Marija
AU  - Maletaškić, Jelena
AU  - Pavlović, Vladimir B.
AU  - Bajat, Jelena
AU  - Đonlagić, Jasna
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3985
AB  - The major aims of this paper are the investigation of the effects of the mixing procedure and the montmorillonite (Mt) surface modification on the structure (optical microscopy, XRD, TEM, SEM), rheological, mechanical properties (DMA, tensile test) and corrosion stability (electrochemical impedance spectroscopy) of clay mineral/epoxy nanocomposite (CPN). Two series of CPN samples were prepared based on diglycidyl ether of bisphenol A (DGEBA) and polyamidoamine curing agent with three organophilic Mt and sodium-montmorillonite (1 wt%). Mt were mixed with DGEBA solution in the powder (direct mixing) and in the form of dispersions, preswollen in a commercial coating thinner (solution intercalation). The commercial Mt (Cloisite 30B) modified by quaternary alkylammonium ions bearing hydroxyl groups and especially Mt functionalized by primary (HDA(+)-Mt) alkylammonium ions, at loadings close to cation exchange capacity (CRC), were significantly swollen by thinner and further uniformly dispersed into CPN. Meanwhile, low gel volumes in thinner were found for more hydrophobic Mt (Cloisite 15A). The compatibility of Mt with solvents was well described by solubility and Flory-Huggins interaction parameters. In contrast to the direct incorporation of Mt powders in CPN, swelling enhanced intercalation of epoxy matrix into Mt, and for HDA(+)-Mt based CPN interlayer spacing reached 4.4 nm. The usage of HDA(+)-Mt organoclay and solution intercalation procedure provided the highest enhancement in rheological parameters (G', G", of Mt/epoxy dispersions and glassy storage modulus, Young's modulus and barrier properties of cured CPN.
PB  - Elsevier Science Bv, Amsterdam
T2  - Applied Clay Science
T1  - Dispersion efficiency of montmorillonites in epoxy nanocomposites using solution intercalation and direct mixing methods
EP  - 63
SP  - 52
VL  - 154
DO  - 10.1016/j.clay.2017.12.047
ER  - 

@article{
author = "Tomić, Miloš and Dunjić, Branko and Nikolić, Marija and Maletaškić, Jelena and Pavlović, Vladimir B. and Bajat, Jelena and Đonlagić, Jasna",
year = "2018",
abstract = "The major aims of this paper are the investigation of the effects of the mixing procedure and the montmorillonite (Mt) surface modification on the structure (optical microscopy, XRD, TEM, SEM), rheological, mechanical properties (DMA, tensile test) and corrosion stability (electrochemical impedance spectroscopy) of clay mineral/epoxy nanocomposite (CPN). Two series of CPN samples were prepared based on diglycidyl ether of bisphenol A (DGEBA) and polyamidoamine curing agent with three organophilic Mt and sodium-montmorillonite (1 wt%). Mt were mixed with DGEBA solution in the powder (direct mixing) and in the form of dispersions, preswollen in a commercial coating thinner (solution intercalation). The commercial Mt (Cloisite 30B) modified by quaternary alkylammonium ions bearing hydroxyl groups and especially Mt functionalized by primary (HDA(+)-Mt) alkylammonium ions, at loadings close to cation exchange capacity (CRC), were significantly swollen by thinner and further uniformly dispersed into CPN. Meanwhile, low gel volumes in thinner were found for more hydrophobic Mt (Cloisite 15A). The compatibility of Mt with solvents was well described by solubility and Flory-Huggins interaction parameters. In contrast to the direct incorporation of Mt powders in CPN, swelling enhanced intercalation of epoxy matrix into Mt, and for HDA(+)-Mt based CPN interlayer spacing reached 4.4 nm. The usage of HDA(+)-Mt organoclay and solution intercalation procedure provided the highest enhancement in rheological parameters (G', G", of Mt/epoxy dispersions and glassy storage modulus, Young's modulus and barrier properties of cured CPN.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Applied Clay Science",
title = "Dispersion efficiency of montmorillonites in epoxy nanocomposites using solution intercalation and direct mixing methods",
pages = "63-52",
volume = "154",
doi = "10.1016/j.clay.2017.12.047"
}

Tomić, M., Dunjić, B., Nikolić, M., Maletaškić, J., Pavlović, V. B., Bajat, J.,& Đonlagić, J.. (2018). Dispersion efficiency of montmorillonites in epoxy nanocomposites using solution intercalation and direct mixing methods. in Applied Clay Science
Elsevier Science Bv, Amsterdam., 154, 52-63.
https://doi.org/10.1016/j.clay.2017.12.047

Tomić M, Dunjić B, Nikolić M, Maletaškić J, Pavlović VB, Bajat J, Đonlagić J. Dispersion efficiency of montmorillonites in epoxy nanocomposites using solution intercalation and direct mixing methods. in Applied Clay Science. 2018;154:52-63.
doi:10.1016/j.clay.2017.12.047 .

Tomić, Miloš, Dunjić, Branko, Nikolić, Marija, Maletaškić, Jelena, Pavlović, Vladimir B., Bajat, Jelena, Đonlagić, Jasna, "Dispersion efficiency of montmorillonites in epoxy nanocomposites using solution intercalation and direct mixing methods" in Applied Clay Science, 154 (2018):52-63,
https://doi.org/10.1016/j.clay.2017.12.047 . .

TY  - JOUR
AU  - Schwager, Petra
AU  - Dunjić, Branko
AU  - Kaltenegger, Ingrid
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3604
AB  - This review paper gives an overview on papers in the field of Chemical Leasing and shortly summarizes and analyses the most interesting and relevant articles published in this field within the last 2-3 years.
PB  - Elsevier, Amsterdam
T2  - Current Opinion in Green and Sustainable Chemistry
T1  - Success and failure of the Chemical Leasing model in addressing sustainability challenges: Evidence from practice
EP  - 17
SP  - 14
VL  - 8
DO  - 10.1016/j.cogsc.2017.08.001
ER  - 

@article{
author = "Schwager, Petra and Dunjić, Branko and Kaltenegger, Ingrid",
year = "2017",
abstract = "This review paper gives an overview on papers in the field of Chemical Leasing and shortly summarizes and analyses the most interesting and relevant articles published in this field within the last 2-3 years.",
publisher = "Elsevier, Amsterdam",
journal = "Current Opinion in Green and Sustainable Chemistry",
title = "Success and failure of the Chemical Leasing model in addressing sustainability challenges: Evidence from practice",
pages = "17-14",
volume = "8",
doi = "10.1016/j.cogsc.2017.08.001"
}

Schwager, P., Dunjić, B.,& Kaltenegger, I.. (2017). Success and failure of the Chemical Leasing model in addressing sustainability challenges: Evidence from practice. in Current Opinion in Green and Sustainable Chemistry
Elsevier, Amsterdam., 8, 14-17.
https://doi.org/10.1016/j.cogsc.2017.08.001

Schwager P, Dunjić B, Kaltenegger I. Success and failure of the Chemical Leasing model in addressing sustainability challenges: Evidence from practice. in Current Opinion in Green and Sustainable Chemistry. 2017;8:14-17.
doi:10.1016/j.cogsc.2017.08.001 .

Schwager, Petra, Dunjić, Branko, Kaltenegger, Ingrid, "Success and failure of the Chemical Leasing model in addressing sustainability challenges: Evidence from practice" in Current Opinion in Green and Sustainable Chemistry, 8 (2017):14-17,
https://doi.org/10.1016/j.cogsc.2017.08.001 . .

TY  - JOUR
AU  - Tomić, Miloš D.
AU  - Dunjić, Branko
AU  - Bajat, Jelena
AU  - Likić, Violeta
AU  - Rogan, Jelena
AU  - Đonlagić, Jasna
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3435
AB  - The preparation of epoxy/clay nanocomposites (NCs) and their insertion into coatings are of great importance since the NCs could enhance the protective performances. In this study, epoxy NCs with 1-10 wt% of nanoclay Cloisite 30B (C30B) were prepared by the sonication-assisted solution method. The rheological measurements of epoxy/C30B suspensions revealed non-Newtonian, shear-thinning behavior of the uncured NCs, with an increase in the viscosity, yield stress, and shear modules with increasing organoclay content, while the dispersion effectiveness of C30B decreased. A significant enhancement of the rheological parameters was observed at the second percolation threshold (4.1 vol%) due to the formation of a continuous network of 45-layer-thick tactoids. Although NCs with 1-3 wt% C30B exhibited slightly reduced mechanical and adhesion properties compared with the cured reference epoxy resin, the epoxy primer and topcoat based on NC with 1 wt% C30B generally displayed improved impact resistance and maintained flexibility, pendulum hardness, and good adhesion properties. Two-layer coating systems, i.e., NC-based primers and topcoats, had higher corrosion stability in a salt spray chamber compared to the unmodified system.
PB  - Springer, New York
T2  - Journal of Coatings Technology and Research
T1  - Anticorrosive epoxy/clay nanocomposite coatings: rheological and protective properties
EP  - 456
IS  - 3
SP  - 439
VL  - 13
DO  - 10.1007/s11998-015-9762-4
ER  - 

@article{
author = "Tomić, Miloš D. and Dunjić, Branko and Bajat, Jelena and Likić, Violeta and Rogan, Jelena and Đonlagić, Jasna",
year = "2016",
abstract = "The preparation of epoxy/clay nanocomposites (NCs) and their insertion into coatings are of great importance since the NCs could enhance the protective performances. In this study, epoxy NCs with 1-10 wt% of nanoclay Cloisite 30B (C30B) were prepared by the sonication-assisted solution method. The rheological measurements of epoxy/C30B suspensions revealed non-Newtonian, shear-thinning behavior of the uncured NCs, with an increase in the viscosity, yield stress, and shear modules with increasing organoclay content, while the dispersion effectiveness of C30B decreased. A significant enhancement of the rheological parameters was observed at the second percolation threshold (4.1 vol%) due to the formation of a continuous network of 45-layer-thick tactoids. Although NCs with 1-3 wt% C30B exhibited slightly reduced mechanical and adhesion properties compared with the cured reference epoxy resin, the epoxy primer and topcoat based on NC with 1 wt% C30B generally displayed improved impact resistance and maintained flexibility, pendulum hardness, and good adhesion properties. Two-layer coating systems, i.e., NC-based primers and topcoats, had higher corrosion stability in a salt spray chamber compared to the unmodified system.",
publisher = "Springer, New York",
journal = "Journal of Coatings Technology and Research",
title = "Anticorrosive epoxy/clay nanocomposite coatings: rheological and protective properties",
pages = "456-439",
number = "3",
volume = "13",
doi = "10.1007/s11998-015-9762-4"
}

Tomić, M. D., Dunjić, B., Bajat, J., Likić, V., Rogan, J.,& Đonlagić, J.. (2016). Anticorrosive epoxy/clay nanocomposite coatings: rheological and protective properties. in Journal of Coatings Technology and Research
Springer, New York., 13(3), 439-456.
https://doi.org/10.1007/s11998-015-9762-4

Tomić MD, Dunjić B, Bajat J, Likić V, Rogan J, Đonlagić J. Anticorrosive epoxy/clay nanocomposite coatings: rheological and protective properties. in Journal of Coatings Technology and Research. 2016;13(3):439-456.
doi:10.1007/s11998-015-9762-4 .

Tomić, Miloš D., Dunjić, Branko, Bajat, Jelena, Likić, Violeta, Rogan, Jelena, Đonlagić, Jasna, "Anticorrosive epoxy/clay nanocomposite coatings: rheological and protective properties" in Journal of Coatings Technology and Research, 13, no. 3 (2016):439-456,
https://doi.org/10.1007/s11998-015-9762-4 . .

TY  - JOUR
AU  - Vukadinović, Bojana
AU  - Popović, Ivanka
AU  - Dunjić, Branko
AU  - Jovović, Aleksandar
AU  - Vlajić, Miloš
AU  - Stanković, Dejan
AU  - Bajić, Zoran
AU  - Kijevčanin, Mirjana
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3304
AB  - Electricity generation using carbon-based fuels is responsible for a large fraction of carbon dioxide emissions worldwide. In Serbia, 70% of the electricity is produced from coal-fired power plants. The aim of this investigation was to identify the retrofitting opportunities to reduce the carbon intensity of power generation. Resource Efficient and Cleaner Production assessment was performed in a coal thermal power plant of the public company "Thermal Power Plants Nikola Tesla", which operates within the Electric Power Industry of Serbia. Assessment of the thermal power plant operation was supported by experimentally measured data (fresh water pressures and temperatures, steam temperatures and pressures, condensing pressure, water flowrate, make-up water flowrate, steam flowrate, coal composition, emissions, etc), emission factor determinations and by using data obtained during unit balancing and simulation of the system's performance. The data collected and analyzed during power plant operation were used for the development of a new general approach with comprehensive analysis of the system, using the following plant eco-efficiency indicators: energy consumption, climate change, acidification, and waste generation. Indicators were used to present decoupling after implementation of the described measures. The analysis of two units showed that the nominal power could be increased by 60 MWe, with an increase of the unit gross efficiency of 0.4%, and a reduction of coal, water and electricity consumption. The implementation of RECP measures in this study enabled analysis of the overall performance of the system as evidenced by the eco-efficiency indicators: energy consumption (decreased by 3%), CO2 emission (decreased by 3%), and SO2 emission (decreased by 39%). Consequently, it may be concluded that the proposed RECP approach, tested on thermal power plants, and presented as eco-efficiency indicators show that the described methodology may be successfully implemented in the energy sector and for the improvement in power plants.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of Cleaner Production
T1  - Correlation between eco-efficiency measures and resource and impact decoupling for thermal power plants in Serbia
EP  - 274
SP  - 264
VL  - 138
DO  - 10.1016/j.jclepro.2016.05.060
ER  - 

@article{
author = "Vukadinović, Bojana and Popović, Ivanka and Dunjić, Branko and Jovović, Aleksandar and Vlajić, Miloš and Stanković, Dejan and Bajić, Zoran and Kijevčanin, Mirjana",
year = "2016",
abstract = "Electricity generation using carbon-based fuels is responsible for a large fraction of carbon dioxide emissions worldwide. In Serbia, 70% of the electricity is produced from coal-fired power plants. The aim of this investigation was to identify the retrofitting opportunities to reduce the carbon intensity of power generation. Resource Efficient and Cleaner Production assessment was performed in a coal thermal power plant of the public company "Thermal Power Plants Nikola Tesla", which operates within the Electric Power Industry of Serbia. Assessment of the thermal power plant operation was supported by experimentally measured data (fresh water pressures and temperatures, steam temperatures and pressures, condensing pressure, water flowrate, make-up water flowrate, steam flowrate, coal composition, emissions, etc), emission factor determinations and by using data obtained during unit balancing and simulation of the system's performance. The data collected and analyzed during power plant operation were used for the development of a new general approach with comprehensive analysis of the system, using the following plant eco-efficiency indicators: energy consumption, climate change, acidification, and waste generation. Indicators were used to present decoupling after implementation of the described measures. The analysis of two units showed that the nominal power could be increased by 60 MWe, with an increase of the unit gross efficiency of 0.4%, and a reduction of coal, water and electricity consumption. The implementation of RECP measures in this study enabled analysis of the overall performance of the system as evidenced by the eco-efficiency indicators: energy consumption (decreased by 3%), CO2 emission (decreased by 3%), and SO2 emission (decreased by 39%). Consequently, it may be concluded that the proposed RECP approach, tested on thermal power plants, and presented as eco-efficiency indicators show that the described methodology may be successfully implemented in the energy sector and for the improvement in power plants.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of Cleaner Production",
title = "Correlation between eco-efficiency measures and resource and impact decoupling for thermal power plants in Serbia",
pages = "274-264",
volume = "138",
doi = "10.1016/j.jclepro.2016.05.060"
}

Vukadinović, B., Popović, I., Dunjić, B., Jovović, A., Vlajić, M., Stanković, D., Bajić, Z.,& Kijevčanin, M.. (2016). Correlation between eco-efficiency measures and resource and impact decoupling for thermal power plants in Serbia. in Journal of Cleaner Production
Elsevier Sci Ltd, Oxford., 138, 264-274.
https://doi.org/10.1016/j.jclepro.2016.05.060

Vukadinović B, Popović I, Dunjić B, Jovović A, Vlajić M, Stanković D, Bajić Z, Kijevčanin M. Correlation between eco-efficiency measures and resource and impact decoupling for thermal power plants in Serbia. in Journal of Cleaner Production. 2016;138:264-274.
doi:10.1016/j.jclepro.2016.05.060 .

Vukadinović, Bojana, Popović, Ivanka, Dunjić, Branko, Jovović, Aleksandar, Vlajić, Miloš, Stanković, Dejan, Bajić, Zoran, Kijevčanin, Mirjana, "Correlation between eco-efficiency measures and resource and impact decoupling for thermal power plants in Serbia" in Journal of Cleaner Production, 138 (2016):264-274,
https://doi.org/10.1016/j.jclepro.2016.05.060 . .

TY  - CHAP
AU  - Marinović, Sanja
AU  - Popović, Ivanka
AU  - Dunjić, Branko
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3176
AB  - Different components of interpenetrating polymer networks (IPNs) have different influence on their properties and their behavior in various applications, such as automotive dual curing applications. Dual curing systems, upon hardening, can give interpenetrating polymer networks (IPNs). UV-thermal dual-cure process that was used to obtain IPNs consisted of an UV curable acrylic component and a classic 2-pack urethane component. Novel acrylate-terminated hyperbranched polyester with high functionality HBP(A) was used as part of the acrylic component, which was cured by UV radiation. The urethane part of the IPNs was classical 2-pack polyurethane and it was crosslinked by heating.The aim was to explore the influence of thermosetting resin HBP(A) on IPN properties. First, the weight ratio of HBP(A) and a reactive diluent 2-ethyl hexyl acrylate (EHA) in the IPNs was varied from 100/0 to 25/75, while the urethane component remained the same in all the IPN samples. Then, the IPN with 50/50 weight ratio in acrylic component was used to investigate the influence of the reactive diluent in IPNs on their behavior, but also to see more clearly the role of the HBP(A) component. All the IPNs were also compared to a classical 2-pack polyurethane clear coat consisted of a hydroxyl functional acrylate copolymer (HA) and Desmodur®N3390.The IPNs were characterized by dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The mechanical properties of the IPNs were also investigated.DMA showed that with increasing HBP(A) in the IPNs, the crosslink density increased, while the flexibility decreased. The data obtained by DMA and DSC showed a decrease of the Tg values with increasing amount of HBP(A). There were slight differences in the thermal stability of the IPNs.
T2  - Micro- and Nano-Structured Interpenetrating Polymer Networks: From Design to Applications
T1  - Micro- and Nanostructured IPNs based on Thermosetting Resins
EP  - 126
SP  - 109
DO  - 10.1002/9781119138945.ch4
ER  - 

@inbook{
author = "Marinović, Sanja and Popović, Ivanka and Dunjić, Branko",
year = "2016",
abstract = "Different components of interpenetrating polymer networks (IPNs) have different influence on their properties and their behavior in various applications, such as automotive dual curing applications. Dual curing systems, upon hardening, can give interpenetrating polymer networks (IPNs). UV-thermal dual-cure process that was used to obtain IPNs consisted of an UV curable acrylic component and a classic 2-pack urethane component. Novel acrylate-terminated hyperbranched polyester with high functionality HBP(A) was used as part of the acrylic component, which was cured by UV radiation. The urethane part of the IPNs was classical 2-pack polyurethane and it was crosslinked by heating.The aim was to explore the influence of thermosetting resin HBP(A) on IPN properties. First, the weight ratio of HBP(A) and a reactive diluent 2-ethyl hexyl acrylate (EHA) in the IPNs was varied from 100/0 to 25/75, while the urethane component remained the same in all the IPN samples. Then, the IPN with 50/50 weight ratio in acrylic component was used to investigate the influence of the reactive diluent in IPNs on their behavior, but also to see more clearly the role of the HBP(A) component. All the IPNs were also compared to a classical 2-pack polyurethane clear coat consisted of a hydroxyl functional acrylate copolymer (HA) and Desmodur®N3390.The IPNs were characterized by dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The mechanical properties of the IPNs were also investigated.DMA showed that with increasing HBP(A) in the IPNs, the crosslink density increased, while the flexibility decreased. The data obtained by DMA and DSC showed a decrease of the Tg values with increasing amount of HBP(A). There were slight differences in the thermal stability of the IPNs.",
journal = "Micro- and Nano-Structured Interpenetrating Polymer Networks: From Design to Applications",
booktitle = "Micro- and Nanostructured IPNs based on Thermosetting Resins",
pages = "126-109",
doi = "10.1002/9781119138945.ch4"
}

Marinović, S., Popović, I.,& Dunjić, B.. (2016). Micro- and Nanostructured IPNs based on Thermosetting Resins. in Micro- and Nano-Structured Interpenetrating Polymer Networks: From Design to Applications, 109-126.
https://doi.org/10.1002/9781119138945.ch4

Marinović S, Popović I, Dunjić B. Micro- and Nanostructured IPNs based on Thermosetting Resins. in Micro- and Nano-Structured Interpenetrating Polymer Networks: From Design to Applications. 2016;:109-126.
doi:10.1002/9781119138945.ch4 .

Marinović, Sanja, Popović, Ivanka, Dunjić, Branko, "Micro- and Nanostructured IPNs based on Thermosetting Resins" in Micro- and Nano-Structured Interpenetrating Polymer Networks: From Design to Applications (2016):109-126,
https://doi.org/10.1002/9781119138945.ch4 . .

TY  - JOUR
AU  - Assenova, Mariana
AU  - Georgiev, Zdravko
AU  - Dunjić, Branko
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3355
AB  - The aim of the paper is to present the results of the application of the RECP methodological approach in the accommodation sector of countries from the Balkan region - Croatia, Serbia, Montenegro and Albania. It is based on the experience from 2015 in 20 hotels (5 in each country), undergone detailed in-plant assessments. The methodology lays down on the understanding that RECP is a continuous application of an integrated preventive environmental strategy applied to processes, products and services to increase overall efficiency, and reduce risks to humans and the environment. Based on the obtained data for the material and energy flows, the paper provides a summary and analyses of the most often proposed and implemented measures. A set of absolute and relative indicators (KPIs) for resources use (energy and water consumption) and pollution generated (air emission and waste water) is used and the expected change due to the implementation of the accepted options is calculated. The performance of the accommodation facilities is compared to the international benchmarks available. The results of the study come to show the great potential of the accommodation sector for more sustainable production and outline the focal points of intervention needed.
PB  - European Center Sustainable Development, Rome
T2  - European Journal of Sustainable Development
T1  - Application of Resource Efficient and Cleaner Production Approach in the Accommodation Sector of the Balkan Region
EP  - 442
IS  - 4
SP  - 431
VL  - 5
DO  - 10.14207/ejsd.2016.v5n4p431
ER  - 

@article{
author = "Assenova, Mariana and Georgiev, Zdravko and Dunjić, Branko",
year = "2016",
abstract = "The aim of the paper is to present the results of the application of the RECP methodological approach in the accommodation sector of countries from the Balkan region - Croatia, Serbia, Montenegro and Albania. It is based on the experience from 2015 in 20 hotels (5 in each country), undergone detailed in-plant assessments. The methodology lays down on the understanding that RECP is a continuous application of an integrated preventive environmental strategy applied to processes, products and services to increase overall efficiency, and reduce risks to humans and the environment. Based on the obtained data for the material and energy flows, the paper provides a summary and analyses of the most often proposed and implemented measures. A set of absolute and relative indicators (KPIs) for resources use (energy and water consumption) and pollution generated (air emission and waste water) is used and the expected change due to the implementation of the accepted options is calculated. The performance of the accommodation facilities is compared to the international benchmarks available. The results of the study come to show the great potential of the accommodation sector for more sustainable production and outline the focal points of intervention needed.",
publisher = "European Center Sustainable Development, Rome",
journal = "European Journal of Sustainable Development",
title = "Application of Resource Efficient and Cleaner Production Approach in the Accommodation Sector of the Balkan Region",
pages = "442-431",
number = "4",
volume = "5",
doi = "10.14207/ejsd.2016.v5n4p431"
}

Assenova, M., Georgiev, Z.,& Dunjić, B.. (2016). Application of Resource Efficient and Cleaner Production Approach in the Accommodation Sector of the Balkan Region. in European Journal of Sustainable Development
European Center Sustainable Development, Rome., 5(4), 431-442.
https://doi.org/10.14207/ejsd.2016.v5n4p431

Assenova M, Georgiev Z, Dunjić B. Application of Resource Efficient and Cleaner Production Approach in the Accommodation Sector of the Balkan Region. in European Journal of Sustainable Development. 2016;5(4):431-442.
doi:10.14207/ejsd.2016.v5n4p431 .

Assenova, Mariana, Georgiev, Zdravko, Dunjić, Branko, "Application of Resource Efficient and Cleaner Production Approach in the Accommodation Sector of the Balkan Region" in European Journal of Sustainable Development, 5, no. 4 (2016):431-442,
https://doi.org/10.14207/ejsd.2016.v5n4p431 . .

TY  - JOUR
AU  - Dunjić, Branko
AU  - Tasić, Srba
AU  - Božić, Branislav
AU  - Aleksandrović-Bondžić, Vesna
AU  - Nikolić, Marija
AU  - Đonlagić, Jasna
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3025
AB  - The rheological behavior of two series of aliphatic hyperbranched (HB) polyesters, based on 2,2-bis(hydroxymethyl) propionic acid (bis-MPA) and di-trimethylol propane (Di-TMP) as a tetrafunctional core, was studied. The effect of the size (pseudo-generation number, from second to eight) and structure on the melt rheological properties was investigated for a series of hydroxylterminated HB polyesters. In addition, the influence of the nature and degree of modification of the terminal OH groups in a series of fourth-generation polyesters end-capped with short and long alkyl chains and some aryl groups on the rheological properties was analyzed. The time-temperature superposition procedure was applied for the construction of master curves and for the analysis of the rheological properties of HB polyesters. The data obtained from WLF analysis of the HB polyesters showed that the values of the thermal coefficient of expansion of free volume alpha(f) and the fractional free volume at the glass transition temperature, f(g), increase with increasing size of the HB polyesters. It was shown that the modified HB polyesters exhibited lower T-g and TG'-G '' temperatures, above which viscous became dominant over elastic behavior. From an analysis of the master curves of the modified HB polyesters, it was observed that with increasing degree of modification, both storage and loss modules and complex dynamic viscosity and apparent energy for viscoelastic relaxation decrease, because of reduced intermolecular hydrogen interactions. They do not exhibit a plateau of rubbery behavior, which confirms that no entanglements are present and that the molar masses are below the critical molar mass.
PB  - Wiley, Hoboken
T2  - Journal of Applied Polymer Science
T1  - Rheological Properties of Hydroxyl-Terminated and End-Capped Aliphatic Hyperbranched Polyesters
IS  - 7
VL  - 132
DO  - 10.1002/app.41479
ER  - 

@article{
author = "Dunjić, Branko and Tasić, Srba and Božić, Branislav and Aleksandrović-Bondžić, Vesna and Nikolić, Marija and Đonlagić, Jasna",
year = "2015",
abstract = "The rheological behavior of two series of aliphatic hyperbranched (HB) polyesters, based on 2,2-bis(hydroxymethyl) propionic acid (bis-MPA) and di-trimethylol propane (Di-TMP) as a tetrafunctional core, was studied. The effect of the size (pseudo-generation number, from second to eight) and structure on the melt rheological properties was investigated for a series of hydroxylterminated HB polyesters. In addition, the influence of the nature and degree of modification of the terminal OH groups in a series of fourth-generation polyesters end-capped with short and long alkyl chains and some aryl groups on the rheological properties was analyzed. The time-temperature superposition procedure was applied for the construction of master curves and for the analysis of the rheological properties of HB polyesters. The data obtained from WLF analysis of the HB polyesters showed that the values of the thermal coefficient of expansion of free volume alpha(f) and the fractional free volume at the glass transition temperature, f(g), increase with increasing size of the HB polyesters. It was shown that the modified HB polyesters exhibited lower T-g and TG'-G '' temperatures, above which viscous became dominant over elastic behavior. From an analysis of the master curves of the modified HB polyesters, it was observed that with increasing degree of modification, both storage and loss modules and complex dynamic viscosity and apparent energy for viscoelastic relaxation decrease, because of reduced intermolecular hydrogen interactions. They do not exhibit a plateau of rubbery behavior, which confirms that no entanglements are present and that the molar masses are below the critical molar mass.",
publisher = "Wiley, Hoboken",
journal = "Journal of Applied Polymer Science",
title = "Rheological Properties of Hydroxyl-Terminated and End-Capped Aliphatic Hyperbranched Polyesters",
number = "7",
volume = "132",
doi = "10.1002/app.41479"
}

Dunjić, B., Tasić, S., Božić, B., Aleksandrović-Bondžić, V., Nikolić, M.,& Đonlagić, J.. (2015). Rheological Properties of Hydroxyl-Terminated and End-Capped Aliphatic Hyperbranched Polyesters. in Journal of Applied Polymer Science
Wiley, Hoboken., 132(7).
https://doi.org/10.1002/app.41479

Dunjić B, Tasić S, Božić B, Aleksandrović-Bondžić V, Nikolić M, Đonlagić J. Rheological Properties of Hydroxyl-Terminated and End-Capped Aliphatic Hyperbranched Polyesters. in Journal of Applied Polymer Science. 2015;132(7).
doi:10.1002/app.41479 .

Dunjić, Branko, Tasić, Srba, Božić, Branislav, Aleksandrović-Bondžić, Vesna, Nikolić, Marija, Đonlagić, Jasna, "Rheological Properties of Hydroxyl-Terminated and End-Capped Aliphatic Hyperbranched Polyesters" in Journal of Applied Polymer Science, 132, no. 7 (2015),
https://doi.org/10.1002/app.41479 . .

TY  - JOUR
AU  - Tomić, Miloš D.
AU  - Dunjić, Branko
AU  - Likić, Violeta
AU  - Bajat, Jelena
AU  - Rogan, Jelena
AU  - Đonlagić, Jasna
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2760
AB  - Epoxy/clay nanocomposites (NC) have become a very interesting topic among researchers in the past two decades because nanoclays have a positive effect on the mechanical, thermal and especially barrier and anticorrosive performances of the polymers. In this study epoxy NCs and NC-based epoxy coatings were prepared by the solution intercalation method using Cloisite 30B as nanoclay. WAXD and SEM analyses revealed that a mainly exfoliated structure was obtained in epoxy NC with 1 wt% clay content, while higher clay loadings reduced the number of exfoliated clay nanolayers and produced a mainly intercalated structure. EIS, TGA and DMA analyses showed that epoxy NCs with clay content below 5 wt% exhibited increased corrosion stability, thermal stability, glass transition temperature (T-g) and storage modulus (G'), in both glassy and rubbery states due to the nanoscale dispersion of Cloisite 30B and the barrier effect of individual nanolayers. Enhanced mechanical properties were also noticed at higher clay loadings, but the rate of improvement was lower. The highest extent of exfoliation and the most homogeneous macromolecular network was found for NC with 1 wt% of clay, leading to the highest improvement of thermal and anticorrosive properties. The salt spray test results showed that anticorrosive properties of epoxy coatings in the presence of 3 wt% and especially 1 wt% of Cloisite 308 were significantly better, thus indicating that nanoclay efficiently modifies the commercial epoxy coatings.
PB  - Elsevier Science Sa, Lausanne
T2  - Progress in Organic Coatings
T1  - The use of nanoclay in preparation of epoxy anticorrosive coatings
EP  - 527
IS  - 2
SP  - 518
VL  - 77
DO  - 10.1016/j.porgcoat.2013.11.017
ER  - 

@article{
author = "Tomić, Miloš D. and Dunjić, Branko and Likić, Violeta and Bajat, Jelena and Rogan, Jelena and Đonlagić, Jasna",
year = "2014",
abstract = "Epoxy/clay nanocomposites (NC) have become a very interesting topic among researchers in the past two decades because nanoclays have a positive effect on the mechanical, thermal and especially barrier and anticorrosive performances of the polymers. In this study epoxy NCs and NC-based epoxy coatings were prepared by the solution intercalation method using Cloisite 30B as nanoclay. WAXD and SEM analyses revealed that a mainly exfoliated structure was obtained in epoxy NC with 1 wt% clay content, while higher clay loadings reduced the number of exfoliated clay nanolayers and produced a mainly intercalated structure. EIS, TGA and DMA analyses showed that epoxy NCs with clay content below 5 wt% exhibited increased corrosion stability, thermal stability, glass transition temperature (T-g) and storage modulus (G'), in both glassy and rubbery states due to the nanoscale dispersion of Cloisite 30B and the barrier effect of individual nanolayers. Enhanced mechanical properties were also noticed at higher clay loadings, but the rate of improvement was lower. The highest extent of exfoliation and the most homogeneous macromolecular network was found for NC with 1 wt% of clay, leading to the highest improvement of thermal and anticorrosive properties. The salt spray test results showed that anticorrosive properties of epoxy coatings in the presence of 3 wt% and especially 1 wt% of Cloisite 308 were significantly better, thus indicating that nanoclay efficiently modifies the commercial epoxy coatings.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Progress in Organic Coatings",
title = "The use of nanoclay in preparation of epoxy anticorrosive coatings",
pages = "527-518",
number = "2",
volume = "77",
doi = "10.1016/j.porgcoat.2013.11.017"
}

Tomić, M. D., Dunjić, B., Likić, V., Bajat, J., Rogan, J.,& Đonlagić, J.. (2014). The use of nanoclay in preparation of epoxy anticorrosive coatings. in Progress in Organic Coatings
Elsevier Science Sa, Lausanne., 77(2), 518-527.
https://doi.org/10.1016/j.porgcoat.2013.11.017

Tomić MD, Dunjić B, Likić V, Bajat J, Rogan J, Đonlagić J. The use of nanoclay in preparation of epoxy anticorrosive coatings. in Progress in Organic Coatings. 2014;77(2):518-527.
doi:10.1016/j.porgcoat.2013.11.017 .

Tomić, Miloš D., Dunjić, Branko, Likić, Violeta, Bajat, Jelena, Rogan, Jelena, Đonlagić, Jasna, "The use of nanoclay in preparation of epoxy anticorrosive coatings" in Progress in Organic Coatings, 77, no. 2 (2014):518-527,
https://doi.org/10.1016/j.porgcoat.2013.11.017 . .

TY  - JOUR
AU  - Džunuzović, Enis
AU  - Tasić, Srba V.
AU  - Božić, Branislav R.
AU  - Džunuzović, Jasna
AU  - Dunjić, Branko
AU  - Jeremić, Katarina B.
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2211
AB  - The properties of urethane acrylate resin mixtures based on the linear and hyperbranched aliphatic polyesters were examined. Linear polyester was synthesized from neopentil glycol and adipic acid. Hyperbranched polyester of the third generation was synthesized from 2,2-bis(hydroxymethyl)propionic acid and di-trimethylol propane. The modification of 60% of hyperbranched aliphatic polyester OH end groups was carried out with isononanoic acid or with soybean fatty acids. Two hyperbranched urethane acrylates, with the same degree of acrylation, and one linear urethane acrylate were obtained by reaction of appropriate polyester and isophorone diisocyanate and 2-hydroxyethyl acrylate. The influence of added amount of HUA and nature of non-acrylic end groups on the rheological, mechanical and thermal properties of the uncured and UV cured mixtures diluted with 20 wt.% hexanediol diacrylate was examined. The nature of non-acrylic end groups have great effect on the interaction between linear and hyperbranched urethane acrylates, which further has a crucial influence on the examined properties of uncured and UV cured mixture samples.
PB  - Elsevier Science Sa, Lausanne
T2  - Progress in Organic Coatings
T1  - Mechanical and thermal properties of UV cured mixtures of linear and hyperbranched urethane acrylates
EP  - 164
IS  - 1
SP  - 158
VL  - 74
DO  - 10.1016/j.porgcoat.2011.12.004
ER  - 

@article{
author = "Džunuzović, Enis and Tasić, Srba V. and Božić, Branislav R. and Džunuzović, Jasna and Dunjić, Branko and Jeremić, Katarina B.",
year = "2012",
abstract = "The properties of urethane acrylate resin mixtures based on the linear and hyperbranched aliphatic polyesters were examined. Linear polyester was synthesized from neopentil glycol and adipic acid. Hyperbranched polyester of the third generation was synthesized from 2,2-bis(hydroxymethyl)propionic acid and di-trimethylol propane. The modification of 60% of hyperbranched aliphatic polyester OH end groups was carried out with isononanoic acid or with soybean fatty acids. Two hyperbranched urethane acrylates, with the same degree of acrylation, and one linear urethane acrylate were obtained by reaction of appropriate polyester and isophorone diisocyanate and 2-hydroxyethyl acrylate. The influence of added amount of HUA and nature of non-acrylic end groups on the rheological, mechanical and thermal properties of the uncured and UV cured mixtures diluted with 20 wt.% hexanediol diacrylate was examined. The nature of non-acrylic end groups have great effect on the interaction between linear and hyperbranched urethane acrylates, which further has a crucial influence on the examined properties of uncured and UV cured mixture samples.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Progress in Organic Coatings",
title = "Mechanical and thermal properties of UV cured mixtures of linear and hyperbranched urethane acrylates",
pages = "164-158",
number = "1",
volume = "74",
doi = "10.1016/j.porgcoat.2011.12.004"
}

Džunuzović, E., Tasić, S. V., Božić, B. R., Džunuzović, J., Dunjić, B.,& Jeremić, K. B.. (2012). Mechanical and thermal properties of UV cured mixtures of linear and hyperbranched urethane acrylates. in Progress in Organic Coatings
Elsevier Science Sa, Lausanne., 74(1), 158-164.
https://doi.org/10.1016/j.porgcoat.2011.12.004

Džunuzović E, Tasić SV, Božić BR, Džunuzović J, Dunjić B, Jeremić KB. Mechanical and thermal properties of UV cured mixtures of linear and hyperbranched urethane acrylates. in Progress in Organic Coatings. 2012;74(1):158-164.
doi:10.1016/j.porgcoat.2011.12.004 .

Džunuzović, Enis, Tasić, Srba V., Božić, Branislav R., Džunuzović, Jasna, Dunjić, Branko, Jeremić, Katarina B., "Mechanical and thermal properties of UV cured mixtures of linear and hyperbranched urethane acrylates" in Progress in Organic Coatings, 74, no. 1 (2012):158-164,
https://doi.org/10.1016/j.porgcoat.2011.12.004 . .

TY  - JOUR
AU  - Marinović, Sanja
AU  - Popović, Ivanka
AU  - Dunjić, Branko
AU  - Tasić, S.
AU  - Božić, B.
AU  - Jovanović, Dušan M.
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1583
AB  - The aim of this study was to investigate the influence of different components of interpenetrating polymer networks (IPNs) on their behavior in dual curing automotive applications. Dual curing is one of possible ways to obtain fast curing, scratch resistant coatings for use in OEM and car refinish applications. Dual curing systems, upon hardening, represent interpenetrating networks (IPNs) [1]. IPN's were obtained using novel acrylate-terminated hyperbranched polyester with high functionality and compared to classical 2-pack polyurethane clear coat. In our previous manuscript [1] we investigated the influence of the acrylated hyperbranched polyester (HBP(A)) content in dual curing systems. In this article we studied the influence of the reactive diluent on dual curing compositions. To this end, we have chosen IPN with 50/50 weigth ratio of polyurethane (PU) and polyacrylic (PA) component. In order to determine more clearly the role of the HBP(A) in one IPN HBP(A) was changed with hexane diol diacrylate (HDDA), keeping the same ratio with EHA. The IPNs were characterized by dynamic-mechanical analysis (DMA), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The mechanical properties of the IPNs were also investigated. The IPN with HDDA as reactive diluent, had the best performance. IPN with H BP(A) had the highest glass transition temperature Tg and the highest crosslink density, but it did not have the highest hardness.
PB  - Elsevier Science Sa, Lausanne
T2  - Progress in Organic Coatings
T1  - The influence of different components on interpenetrating polymer network's (IPN's) characteristics as automotive top coats
EP  - 298
IS  - 4
SP  - 293
VL  - 68
DO  - 10.1016/j.porgcoat.2010.03.010
ER  - 

@article{
author = "Marinović, Sanja and Popović, Ivanka and Dunjić, Branko and Tasić, S. and Božić, B. and Jovanović, Dušan M.",
year = "2010",
abstract = "The aim of this study was to investigate the influence of different components of interpenetrating polymer networks (IPNs) on their behavior in dual curing automotive applications. Dual curing is one of possible ways to obtain fast curing, scratch resistant coatings for use in OEM and car refinish applications. Dual curing systems, upon hardening, represent interpenetrating networks (IPNs) [1]. IPN's were obtained using novel acrylate-terminated hyperbranched polyester with high functionality and compared to classical 2-pack polyurethane clear coat. In our previous manuscript [1] we investigated the influence of the acrylated hyperbranched polyester (HBP(A)) content in dual curing systems. In this article we studied the influence of the reactive diluent on dual curing compositions. To this end, we have chosen IPN with 50/50 weigth ratio of polyurethane (PU) and polyacrylic (PA) component. In order to determine more clearly the role of the HBP(A) in one IPN HBP(A) was changed with hexane diol diacrylate (HDDA), keeping the same ratio with EHA. The IPNs were characterized by dynamic-mechanical analysis (DMA), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The mechanical properties of the IPNs were also investigated. The IPN with HDDA as reactive diluent, had the best performance. IPN with H BP(A) had the highest glass transition temperature Tg and the highest crosslink density, but it did not have the highest hardness.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Progress in Organic Coatings",
title = "The influence of different components on interpenetrating polymer network's (IPN's) characteristics as automotive top coats",
pages = "298-293",
number = "4",
volume = "68",
doi = "10.1016/j.porgcoat.2010.03.010"
}

Marinović, S., Popović, I., Dunjić, B., Tasić, S., Božić, B.,& Jovanović, D. M.. (2010). The influence of different components on interpenetrating polymer network's (IPN's) characteristics as automotive top coats. in Progress in Organic Coatings
Elsevier Science Sa, Lausanne., 68(4), 293-298.
https://doi.org/10.1016/j.porgcoat.2010.03.010

Marinović S, Popović I, Dunjić B, Tasić S, Božić B, Jovanović DM. The influence of different components on interpenetrating polymer network's (IPN's) characteristics as automotive top coats. in Progress in Organic Coatings. 2010;68(4):293-298.
doi:10.1016/j.porgcoat.2010.03.010 .

Marinović, Sanja, Popović, Ivanka, Dunjić, Branko, Tasić, S., Božić, B., Jovanović, Dušan M., "The influence of different components on interpenetrating polymer network's (IPN's) characteristics as automotive top coats" in Progress in Organic Coatings, 68, no. 4 (2010):293-298,
https://doi.org/10.1016/j.porgcoat.2010.03.010 . .

TY  - JOUR
AU  - Simić, Sanja
AU  - Dunjić, Branko
AU  - Tasić, S.
AU  - Božić, Bojan
AU  - Jovanović, Dušan M.
AU  - Popović, Ivanka
PY  - 2008
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1233
AB  - The aim of this study was to investigate the possibility of using acrylated hyperbranched polyesters (HBP) as UV curable component in dual curing automotive applications. Dual curing is one of possible ways to obtain fast curing, scratch resistant coatings for use in OEM and car refinish applications. Dual curing systems, upon hardening, can give interpenetrating networks (IPNs). All the IPNs were obtained by UV-thermal dual cure process and they consisted of an UV curable acrylic component and a classic 2-pack urethane component. The acrylic component was acrylated hyperbranched polyester (HBP(A)) and 2-ethyl hexyl acrylate (EHA). The classic 2-pack urethane component consisted of a hydroxyl functional acrylate copolymer (HA) and Desniodur (R)) N3390. The weight ratio of HBP(A) and EHA in the IPNs was varied from 100/0 to 25/75, while the urethane component remained the same in all the IPN samples. The IPNs were characterized by dynamic-mechanical analysis (DMA), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The mechanical properties of the IPNs were also investigated. A single glass transition temperature, T-g, indicated that a homogeneous material with no separation domain was obtained. DMA showed that with increasing HBP(A) in the IPNs, the crosslink density increased, while the flexibility decreased. The data obtained by DMA and DSC showed a decrease of the T-g values with increasing amount of HBP(A). There were slight differences in the thermal stability of the IPNs.
PB  - Elsevier Science Sa, Lausanne
T2  - Progress in Organic Coatings
T1  - Synthesis and characterization of interpenetrating polymer networks with hyperbranched polymers through thermal-UV dual curing
EP  - 48
IS  - 1
SP  - 43
VL  - 63
DO  - 10.1016/j.porgcoat.2008.04.006
ER  - 

@article{
author = "Simić, Sanja and Dunjić, Branko and Tasić, S. and Božić, Bojan and Jovanović, Dušan M. and Popović, Ivanka",
year = "2008",
abstract = "The aim of this study was to investigate the possibility of using acrylated hyperbranched polyesters (HBP) as UV curable component in dual curing automotive applications. Dual curing is one of possible ways to obtain fast curing, scratch resistant coatings for use in OEM and car refinish applications. Dual curing systems, upon hardening, can give interpenetrating networks (IPNs). All the IPNs were obtained by UV-thermal dual cure process and they consisted of an UV curable acrylic component and a classic 2-pack urethane component. The acrylic component was acrylated hyperbranched polyester (HBP(A)) and 2-ethyl hexyl acrylate (EHA). The classic 2-pack urethane component consisted of a hydroxyl functional acrylate copolymer (HA) and Desniodur (R)) N3390. The weight ratio of HBP(A) and EHA in the IPNs was varied from 100/0 to 25/75, while the urethane component remained the same in all the IPN samples. The IPNs were characterized by dynamic-mechanical analysis (DMA), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The mechanical properties of the IPNs were also investigated. A single glass transition temperature, T-g, indicated that a homogeneous material with no separation domain was obtained. DMA showed that with increasing HBP(A) in the IPNs, the crosslink density increased, while the flexibility decreased. The data obtained by DMA and DSC showed a decrease of the T-g values with increasing amount of HBP(A). There were slight differences in the thermal stability of the IPNs.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Progress in Organic Coatings",
title = "Synthesis and characterization of interpenetrating polymer networks with hyperbranched polymers through thermal-UV dual curing",
pages = "48-43",
number = "1",
volume = "63",
doi = "10.1016/j.porgcoat.2008.04.006"
}

Simić, S., Dunjić, B., Tasić, S., Božić, B., Jovanović, D. M.,& Popović, I.. (2008). Synthesis and characterization of interpenetrating polymer networks with hyperbranched polymers through thermal-UV dual curing. in Progress in Organic Coatings
Elsevier Science Sa, Lausanne., 63(1), 43-48.
https://doi.org/10.1016/j.porgcoat.2008.04.006

Simić S, Dunjić B, Tasić S, Božić B, Jovanović DM, Popović I. Synthesis and characterization of interpenetrating polymer networks with hyperbranched polymers through thermal-UV dual curing. in Progress in Organic Coatings. 2008;63(1):43-48.
doi:10.1016/j.porgcoat.2008.04.006 .

Simić, Sanja, Dunjić, Branko, Tasić, S., Božić, Bojan, Jovanović, Dušan M., Popović, Ivanka, "Synthesis and characterization of interpenetrating polymer networks with hyperbranched polymers through thermal-UV dual curing" in Progress in Organic Coatings, 63, no. 1 (2008):43-48,
https://doi.org/10.1016/j.porgcoat.2008.04.006 . .

TY  - JOUR
AU  - Džunuzović, Enis
AU  - Tasić, S.
AU  - Božić, B.
AU  - Jeremić, Katarina B.
AU  - Dunjić, Branko
PY  - 2006
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1005
AB  - Urethane acrylate resins based on partially modified aliphatic hyperbranched polyesters (HBP) were synthesized. HBP of the second and the third pseudo-generation were synthesized from 2,2-bis(hydroxymethyl)propionic acid and di-trimethylol propane. The modification of 60% of the OH end-groups was carried out with isononanoic acid. Urethane acrylates with different degrees of acrylation were obtained by reaction of partially modified HBP and different amounts of acrylate-isocyanate adduct (NCO), which had been previously obtained by reaction of equimolar amounts of isophorone diisocyanate and 2-hydroxyethyl acrylate. The synthesized samples were characterized by FT-IR, H-1 and C-13 NMR spectroscopy and GPC. The rheological properties of uncured samples and the mechanical and thermal properties of UV cured urethane acrylates diluted with 20 wt.% hexanediol diacrylate were examined. The modification of the OH end-groups with isononanoic acid caused a rapid decrease in the viscosity of the HBPs. The examined properties of the urethane acrylates mainly depended on the degree of acrylation.
PB  - Elsevier, Amsterdam
T2  - Reactive & Functional Polymers
T1  - Photoreactive hyperbranched urethane acrylates modified with a branched saturated fatty acid
EP  - 1105
IS  - 10
SP  - 1097
VL  - 66
DO  - 10.1016/j.reactfunctpolym.2006.01.016
ER  - 

@article{
author = "Džunuzović, Enis and Tasić, S. and Božić, B. and Jeremić, Katarina B. and Dunjić, Branko",
year = "2006",
abstract = "Urethane acrylate resins based on partially modified aliphatic hyperbranched polyesters (HBP) were synthesized. HBP of the second and the third pseudo-generation were synthesized from 2,2-bis(hydroxymethyl)propionic acid and di-trimethylol propane. The modification of 60% of the OH end-groups was carried out with isononanoic acid. Urethane acrylates with different degrees of acrylation were obtained by reaction of partially modified HBP and different amounts of acrylate-isocyanate adduct (NCO), which had been previously obtained by reaction of equimolar amounts of isophorone diisocyanate and 2-hydroxyethyl acrylate. The synthesized samples were characterized by FT-IR, H-1 and C-13 NMR spectroscopy and GPC. The rheological properties of uncured samples and the mechanical and thermal properties of UV cured urethane acrylates diluted with 20 wt.% hexanediol diacrylate were examined. The modification of the OH end-groups with isononanoic acid caused a rapid decrease in the viscosity of the HBPs. The examined properties of the urethane acrylates mainly depended on the degree of acrylation.",
publisher = "Elsevier, Amsterdam",
journal = "Reactive & Functional Polymers",
title = "Photoreactive hyperbranched urethane acrylates modified with a branched saturated fatty acid",
pages = "1105-1097",
number = "10",
volume = "66",
doi = "10.1016/j.reactfunctpolym.2006.01.016"
}

Džunuzović, E., Tasić, S., Božić, B., Jeremić, K. B.,& Dunjić, B.. (2006). Photoreactive hyperbranched urethane acrylates modified with a branched saturated fatty acid. in Reactive & Functional Polymers
Elsevier, Amsterdam., 66(10), 1097-1105.
https://doi.org/10.1016/j.reactfunctpolym.2006.01.016

Džunuzović E, Tasić S, Božić B, Jeremić KB, Dunjić B. Photoreactive hyperbranched urethane acrylates modified with a branched saturated fatty acid. in Reactive & Functional Polymers. 2006;66(10):1097-1105.
doi:10.1016/j.reactfunctpolym.2006.01.016 .

Džunuzović, Enis, Tasić, S., Božić, B., Jeremić, Katarina B., Dunjić, Branko, "Photoreactive hyperbranched urethane acrylates modified with a branched saturated fatty acid" in Reactive & Functional Polymers, 66, no. 10 (2006):1097-1105,
https://doi.org/10.1016/j.reactfunctpolym.2006.01.016 . .

TY  - JOUR
AU  - Džunuzović, Enis
AU  - Tasić, S
AU  - Božić, B
AU  - Babić, Dragan
AU  - Dunjić, Branko
PY  - 2005
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/750
AB  - Urethane acrylate resins based on partially modified aliphatic hyperbranched polyesters (HBP) have been synthesized. HBP of the second and the third generation were synthesized from 2,2-bis(hydroxymethyl)propionic acid and di-trimethylol propane. The modification of certain amount of OH end-groups was carried out with soybean fatty acids. The urethane acrylates with different degrees of acrylation have been obtained by reaction of partially modified HBP and different amounts of NCO adduct which had been previously obtained by reaction of equimolar amounts of isophorone diisocyanate and 2-hydroxyethyl acrylate. The synthesized samples were characterized by FT-IR,H-1 and C-13 NMR and GPC. The theological properties of uncured samples and mechanical and thermal properties of UV cured urethane acrylates diluted with 20 wt.% hexanediol diacrylate were examined. The modification of OH end-groups with soybean fatty acids causes a rapid decrease in viscosity of HBP. The examined properties of urethane acrylates depend on the degree of acrylation. After irradiating, the additional cross-linking, which is caused by reaction of double bonds from unsaturated fatty acids, has also important effect on the properties of cured samples.
PB  - Elsevier Science Sa, Lausanne
T2  - Progress in Organic Coatings
T1  - UV-curable hyperbranched urethane acrylate oligomers containing soybean fatty acids
EP  - 143
IS  - 2
SP  - 136
VL  - 52
DO  - 10.1016/j.porgcoat.2004.10.003
ER  - 

@article{
author = "Džunuzović, Enis and Tasić, S and Božić, B and Babić, Dragan and Dunjić, Branko",
year = "2005",
abstract = "Urethane acrylate resins based on partially modified aliphatic hyperbranched polyesters (HBP) have been synthesized. HBP of the second and the third generation were synthesized from 2,2-bis(hydroxymethyl)propionic acid and di-trimethylol propane. The modification of certain amount of OH end-groups was carried out with soybean fatty acids. The urethane acrylates with different degrees of acrylation have been obtained by reaction of partially modified HBP and different amounts of NCO adduct which had been previously obtained by reaction of equimolar amounts of isophorone diisocyanate and 2-hydroxyethyl acrylate. The synthesized samples were characterized by FT-IR,H-1 and C-13 NMR and GPC. The theological properties of uncured samples and mechanical and thermal properties of UV cured urethane acrylates diluted with 20 wt.% hexanediol diacrylate were examined. The modification of OH end-groups with soybean fatty acids causes a rapid decrease in viscosity of HBP. The examined properties of urethane acrylates depend on the degree of acrylation. After irradiating, the additional cross-linking, which is caused by reaction of double bonds from unsaturated fatty acids, has also important effect on the properties of cured samples.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Progress in Organic Coatings",
title = "UV-curable hyperbranched urethane acrylate oligomers containing soybean fatty acids",
pages = "143-136",
number = "2",
volume = "52",
doi = "10.1016/j.porgcoat.2004.10.003"
}

Džunuzović, E., Tasić, S., Božić, B., Babić, D.,& Dunjić, B.. (2005). UV-curable hyperbranched urethane acrylate oligomers containing soybean fatty acids. in Progress in Organic Coatings
Elsevier Science Sa, Lausanne., 52(2), 136-143.
https://doi.org/10.1016/j.porgcoat.2004.10.003

Džunuzović E, Tasić S, Božić B, Babić D, Dunjić B. UV-curable hyperbranched urethane acrylate oligomers containing soybean fatty acids. in Progress in Organic Coatings. 2005;52(2):136-143.
doi:10.1016/j.porgcoat.2004.10.003 .

Džunuzović, Enis, Tasić, S, Božić, B, Babić, Dragan, Dunjić, Branko, "UV-curable hyperbranched urethane acrylate oligomers containing soybean fatty acids" in Progress in Organic Coatings, 52, no. 2 (2005):136-143,
https://doi.org/10.1016/j.porgcoat.2004.10.003 . .

TY  - JOUR
AU  - Avramović, Milena
AU  - Katsikas, Lynne
AU  - Dunjić, Branko
AU  - Popović, Ivanka
PY  - 2004
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/619
AB  - The fundamentals of controlled radical polymerization are presented in this review. The paper focuses on reversible addition fragmentation chain transfer (RAFT) polymerization. The mechanism and specifics of this type of polymerization are discussed, as are the possibilities of synthesizing complex macro-molecular structures. The synthesis and properties of RAFT agents, of the general structure Z-C(=S)-S-R, are presented.
AB  - U ovom radu predstavljeni su osnovi kontrolisane radikalne polimerizacije. Najveća pažnja posvećena je radikalnoj polimerizaciji sa ravnotežnim adiciono-fragmentacionim prenosom aktivnosti (RAFT). Navedeni su mehanizam i osobenosti ove vrste polimerizacije, kao i mogućnosti za sintezu složenih makromolekulskih struktura. Objašnjene su sinteza i svojstva RAFT agenasa, opšte strukture Z-C(=S)-S-R.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Reversible addition fragmentation chain transfer polymerization - RAFT
T1  - Radikalna polimerizacija sa ravnotežnim adiciono-fragmentacionim prenosom lančane aktivnosti - RAFT
EP  - 520
IS  - 11
SP  - 514
VL  - 58
DO  - 10.2298/HEMIND0411514A
ER  - 

@article{
author = "Avramović, Milena and Katsikas, Lynne and Dunjić, Branko and Popović, Ivanka",
year = "2004",
abstract = "The fundamentals of controlled radical polymerization are presented in this review. The paper focuses on reversible addition fragmentation chain transfer (RAFT) polymerization. The mechanism and specifics of this type of polymerization are discussed, as are the possibilities of synthesizing complex macro-molecular structures. The synthesis and properties of RAFT agents, of the general structure Z-C(=S)-S-R, are presented., U ovom radu predstavljeni su osnovi kontrolisane radikalne polimerizacije. Najveća pažnja posvećena je radikalnoj polimerizaciji sa ravnotežnim adiciono-fragmentacionim prenosom aktivnosti (RAFT). Navedeni su mehanizam i osobenosti ove vrste polimerizacije, kao i mogućnosti za sintezu složenih makromolekulskih struktura. Objašnjene su sinteza i svojstva RAFT agenasa, opšte strukture Z-C(=S)-S-R.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Reversible addition fragmentation chain transfer polymerization - RAFT, Radikalna polimerizacija sa ravnotežnim adiciono-fragmentacionim prenosom lančane aktivnosti - RAFT",
pages = "520-514",
number = "11",
volume = "58",
doi = "10.2298/HEMIND0411514A"
}

Avramović, M., Katsikas, L., Dunjić, B.,& Popović, I.. (2004). Reversible addition fragmentation chain transfer polymerization - RAFT. in Hemijska industrija
Association of Chemical Engineers of Serbia., 58(11), 514-520.
https://doi.org/10.2298/HEMIND0411514A

Avramović M, Katsikas L, Dunjić B, Popović I. Reversible addition fragmentation chain transfer polymerization - RAFT. in Hemijska industrija. 2004;58(11):514-520.
doi:10.2298/HEMIND0411514A .

Avramović, Milena, Katsikas, Lynne, Dunjić, Branko, Popović, Ivanka, "Reversible addition fragmentation chain transfer polymerization - RAFT" in Hemijska industrija, 58, no. 11 (2004):514-520,
https://doi.org/10.2298/HEMIND0411514A . .

TY  - JOUR
AU  - Tasić, S
AU  - Božić, B
AU  - Dunjić, Branko
PY  - 2004
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/691
AB  - Three series of hyperbranched urethane-acrylates (HB-UA), based on aliphatic hyperbranched polyesters and polyethyleneglycol acrylate, were prepared and evaluated for use in UV-curable coatings. UV-curing kinetics were monitored by FT-IR spectroscopy. The thermal and mechanical properties of UV-cured HB-UA were investigated by means of differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) and correlated to the mechanical properties of coatings (hardness and flexibility). These new HB-UA's are very reactive and did not show oxygen inhibition. Obtained coatings have good mechanical properties and solvent resistance.
PB  - Elsevier Science Sa, Lausanne
T2  - Progress in Organic Coatings
T1  - Synthesis of new hyperbranched urethane-acrylates and their evaluation in UV-curable coatings
EP  - 328
IS  - 4
SP  - 321
VL  - 51
DO  - 10.1016/j.porgcoat.2004.07.021
ER  - 

@article{
author = "Tasić, S and Božić, B and Dunjić, Branko",
year = "2004",
abstract = "Three series of hyperbranched urethane-acrylates (HB-UA), based on aliphatic hyperbranched polyesters and polyethyleneglycol acrylate, were prepared and evaluated for use in UV-curable coatings. UV-curing kinetics were monitored by FT-IR spectroscopy. The thermal and mechanical properties of UV-cured HB-UA were investigated by means of differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) and correlated to the mechanical properties of coatings (hardness and flexibility). These new HB-UA's are very reactive and did not show oxygen inhibition. Obtained coatings have good mechanical properties and solvent resistance.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Progress in Organic Coatings",
title = "Synthesis of new hyperbranched urethane-acrylates and their evaluation in UV-curable coatings",
pages = "328-321",
number = "4",
volume = "51",
doi = "10.1016/j.porgcoat.2004.07.021"
}

Tasić, S., Božić, B.,& Dunjić, B.. (2004). Synthesis of new hyperbranched urethane-acrylates and their evaluation in UV-curable coatings. in Progress in Organic Coatings
Elsevier Science Sa, Lausanne., 51(4), 321-328.
https://doi.org/10.1016/j.porgcoat.2004.07.021

Tasić S, Božić B, Dunjić B. Synthesis of new hyperbranched urethane-acrylates and their evaluation in UV-curable coatings. in Progress in Organic Coatings. 2004;51(4):321-328.
doi:10.1016/j.porgcoat.2004.07.021 .

Tasić, S, Božić, B, Dunjić, Branko, "Synthesis of new hyperbranched urethane-acrylates and their evaluation in UV-curable coatings" in Progress in Organic Coatings, 51, no. 4 (2004):321-328,
https://doi.org/10.1016/j.porgcoat.2004.07.021 . .

TY  - JOUR
AU  - Džunuzović, Enis
AU  - Tasić, S
AU  - Božić, B
AU  - Babić, Dragan
AU  - Dunjić, Branko
PY  - 2004
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/705
AB  - A series of acrylate functionalized samples based on hyperbranched hydroxy-terminated polyesters with different molecular weights and different degrees of acrylation were synthesized. The obtained urethane acrylates were slightly yellow viscose liquids. Their composition characterized by FTIR and H-1-NMR spectroscopy and their molecular weights were measured by GPC. All the synthesized samples were diluted with 25 wt.% 1.4-butanediol dimethacrylate (BDDM). The rheological properties of the uncured samples and the dynamic mechanical properties of the UV cured samples were examined. All the samples exhibit Newtonian behavior, which indicates the absence of physical entanglements in these polymers. The viscosity increases with increasing number of acrylic groups per molecule. The glass transition temperature of the UV cured samples increases with increasing the number of acrylic groups per molecule. The value of the storage modulus in the rubber-elastic plateau and the cross-link density increase with increasing number of acrylic groups per molecule. The formed networks are inhomogeneous and the residual unsaturation is the highest in the samples with the largest number of acrylic groups per molecule.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Dynamical mechanical analysis of photocrosslinked hyperbranched urethane acrylates
EP  - 453
IS  - 6
SP  - 441
VL  - 69
DO  - 10.2298/JSC0406441D
ER  - 

@article{
author = "Džunuzović, Enis and Tasić, S and Božić, B and Babić, Dragan and Dunjić, Branko",
year = "2004",
abstract = "A series of acrylate functionalized samples based on hyperbranched hydroxy-terminated polyesters with different molecular weights and different degrees of acrylation were synthesized. The obtained urethane acrylates were slightly yellow viscose liquids. Their composition characterized by FTIR and H-1-NMR spectroscopy and their molecular weights were measured by GPC. All the synthesized samples were diluted with 25 wt.% 1.4-butanediol dimethacrylate (BDDM). The rheological properties of the uncured samples and the dynamic mechanical properties of the UV cured samples were examined. All the samples exhibit Newtonian behavior, which indicates the absence of physical entanglements in these polymers. The viscosity increases with increasing number of acrylic groups per molecule. The glass transition temperature of the UV cured samples increases with increasing the number of acrylic groups per molecule. The value of the storage modulus in the rubber-elastic plateau and the cross-link density increase with increasing number of acrylic groups per molecule. The formed networks are inhomogeneous and the residual unsaturation is the highest in the samples with the largest number of acrylic groups per molecule.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Dynamical mechanical analysis of photocrosslinked hyperbranched urethane acrylates",
pages = "453-441",
number = "6",
volume = "69",
doi = "10.2298/JSC0406441D"
}

Džunuzović, E., Tasić, S., Božić, B., Babić, D.,& Dunjić, B.. (2004). Dynamical mechanical analysis of photocrosslinked hyperbranched urethane acrylates. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 69(6), 441-453.
https://doi.org/10.2298/JSC0406441D

Džunuzović E, Tasić S, Božić B, Babić D, Dunjić B. Dynamical mechanical analysis of photocrosslinked hyperbranched urethane acrylates. in Journal of the Serbian Chemical Society. 2004;69(6):441-453.
doi:10.2298/JSC0406441D .

Džunuzović, Enis, Tasić, S, Božić, B, Babić, Dragan, Dunjić, Branko, "Dynamical mechanical analysis of photocrosslinked hyperbranched urethane acrylates" in Journal of the Serbian Chemical Society, 69, no. 6 (2004):441-453,
https://doi.org/10.2298/JSC0406441D . .

TY  - JOUR
AU  - Dunjić, Branko
AU  - Đonlagić, Jasna
AU  - Vukašinović, Slavko
AU  - Sepulchre, M.O.
AU  - Sepulchre, M.O.
AU  - Spassky, Nicolas
PY  - 2003
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/575
AB  - The crosslinking reaction of three series of α,ω-dihydroxy oligo(alkylene maleate)s with a trifunctional isocyanate was followed by dynamic mechanical analysis and FTIR spectroscopy. The evaluation of rheological parameters such as storage G’ and loss modulus G", was recorded. A typical G’versus time curve has a characteristic "S" shape, indicating autoacceleration of the crosslinking reaction. The whole curing process starting from G’equal G", or the beginning of gelation is described by a second - order phenomenological rheokinetic equation which takes into account the autoacceleration effect, the latter being a consequence of the superposition of both the chemical reaction and phase segregation. It appears that the crosslinking reaction rate depends on the concentration of the functional groups, i.e., on the molecular weight of the polyester prepolymer and on the length of the aliphatic sequence in the repeating unit or the segmental mobility. The crosslinking rate decreases in the order: poly(octamethylene maleate)  gt  poly(hexamethylene maleate)  gt  poly(butylene maleate).
AB  - Kinetika reakcije umrežavanja je izučavana pomoću dinamičke mehaničke analize i FTIR spektroskopije na tri serije α,ω-dihidroksi-oligo(alkilen-maleata) i trifunkcionalnog izocijanata. Reakcija umrežavanja polimera praćena je preko promene reoloških parametara kao što su modul sačuvane energije G’ i modul izgubljene energije G". Kriva zavisnosti G’ od vremena ima karakterističan "S" oblik, što ukazuje na samoubrzavanje pri reakciji umrežavanja. Ceo proces umrežavanja od početka želiranja, odnosno, od trenutka kada je G’ jednako G", je opisan fenomenološkom reokinetičkom jednačinom drugog reda koja uzima u obzir efekat samoubrzavanja, kao posledicu superpozicije hemijske reakcije i morfoloških promena. Pokazano je da brzina reakcije umrežavanja zavisi kako od koncentracije funkcionalnih grupa, tj. od molarne mase poliestarskog pretpolimera, tako i od dužine alifatične sekvence u osnovnom motivu ili segmentalne pokretljivosti. Brzina reakcije umrežavanja opada u nizu poli(oktametilen–maleat)  gt  poli(heksametilen–maleat)  gt  poli(butilen–maleat).
PB  - Serbian Chemical Society, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Rheokinetic study of crosslinking of α,ω-dihydroxy oligo(alkylene maleate)s with a trisisocyanate
T1  - Reokinetičko izučavanje umrežavanja α,ω-dihidroksi oligo(alkilen maleata) triizocijanatima
EP  - 162
IS  - 3
SP  - 147
VL  - 68
DO  - 10.2298/JSC0303147D
ER  - 

@article{
author = "Dunjić, Branko and Đonlagić, Jasna and Vukašinović, Slavko and Sepulchre, M.O. and Sepulchre, M.O. and Spassky, Nicolas",
year = "2003",
abstract = "The crosslinking reaction of three series of α,ω-dihydroxy oligo(alkylene maleate)s with a trifunctional isocyanate was followed by dynamic mechanical analysis and FTIR spectroscopy. The evaluation of rheological parameters such as storage G’ and loss modulus G", was recorded. A typical G’versus time curve has a characteristic "S" shape, indicating autoacceleration of the crosslinking reaction. The whole curing process starting from G’equal G", or the beginning of gelation is described by a second - order phenomenological rheokinetic equation which takes into account the autoacceleration effect, the latter being a consequence of the superposition of both the chemical reaction and phase segregation. It appears that the crosslinking reaction rate depends on the concentration of the functional groups, i.e., on the molecular weight of the polyester prepolymer and on the length of the aliphatic sequence in the repeating unit or the segmental mobility. The crosslinking rate decreases in the order: poly(octamethylene maleate)  gt  poly(hexamethylene maleate)  gt  poly(butylene maleate)., Kinetika reakcije umrežavanja je izučavana pomoću dinamičke mehaničke analize i FTIR spektroskopije na tri serije α,ω-dihidroksi-oligo(alkilen-maleata) i trifunkcionalnog izocijanata. Reakcija umrežavanja polimera praćena je preko promene reoloških parametara kao što su modul sačuvane energije G’ i modul izgubljene energije G". Kriva zavisnosti G’ od vremena ima karakterističan "S" oblik, što ukazuje na samoubrzavanje pri reakciji umrežavanja. Ceo proces umrežavanja od početka želiranja, odnosno, od trenutka kada je G’ jednako G", je opisan fenomenološkom reokinetičkom jednačinom drugog reda koja uzima u obzir efekat samoubrzavanja, kao posledicu superpozicije hemijske reakcije i morfoloških promena. Pokazano je da brzina reakcije umrežavanja zavisi kako od koncentracije funkcionalnih grupa, tj. od molarne mase poliestarskog pretpolimera, tako i od dužine alifatične sekvence u osnovnom motivu ili segmentalne pokretljivosti. Brzina reakcije umrežavanja opada u nizu poli(oktametilen–maleat)  gt  poli(heksametilen–maleat)  gt  poli(butilen–maleat).",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Rheokinetic study of crosslinking of α,ω-dihydroxy oligo(alkylene maleate)s with a trisisocyanate, Reokinetičko izučavanje umrežavanja α,ω-dihidroksi oligo(alkilen maleata) triizocijanatima",
pages = "162-147",
number = "3",
volume = "68",
doi = "10.2298/JSC0303147D"
}

Dunjić, B., Đonlagić, J., Vukašinović, S., Sepulchre, M.O., Sepulchre, M.O.,& Spassky, N.. (2003). Rheokinetic study of crosslinking of α,ω-dihydroxy oligo(alkylene maleate)s with a trisisocyanate. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 68(3), 147-162.
https://doi.org/10.2298/JSC0303147D

Dunjić B, Đonlagić J, Vukašinović S, Sepulchre M, Sepulchre M, Spassky N. Rheokinetic study of crosslinking of α,ω-dihydroxy oligo(alkylene maleate)s with a trisisocyanate. in Journal of the Serbian Chemical Society. 2003;68(3):147-162.
doi:10.2298/JSC0303147D .

Dunjić, Branko, Đonlagić, Jasna, Vukašinović, Slavko, Sepulchre, M.O., Sepulchre, M.O., Spassky, Nicolas, "Rheokinetic study of crosslinking of α,ω-dihydroxy oligo(alkylene maleate)s with a trisisocyanate" in Journal of the Serbian Chemical Society, 68, no. 3 (2003):147-162,
https://doi.org/10.2298/JSC0303147D . .

TY  - JOUR
AU  - Marković, S
AU  - Dunjić, Branko
AU  - Zlatanić, Alisa
AU  - Đonlagić, Jasna
PY  - 2001
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/340
AB  - The curing reaction of typical commercial phenol-formaldehyde novolac resins with hexamethylentetraamine (HMTA) was followed by dynamic mechanical analysis. The evolution of the rheological parameters, such as storage modulus G ', loss modulus G ", and tan delta (G " /G '), as a function of time, for samples of the phenolic resins on cloth, was recorded. The curing reaction, leading to the formation of a crosslinked structure, is described by a third-order phenomenological equation. This equation takes into account a self-acceleration effect, as a consequence not only of the chemical reaction of crosslinking after the gel point but of phase segregation as well. This rheokinetic model of the curing of phenolic novolac resins permits the determination of the numerical values of the kinetic equation constants. The influence of the composition, structure, and physical treatment on the curing kinetics of the novolac resins is evaluated.
PB  - Wiley, Hoboken
T2  - Journal of Applied Polymer Science
T1  - Dynamic mechanical analysis study of the curing of phenol-formaldehyde novolac resins
EP  - 1913
IS  - 8
SP  - 1902
VL  - 81
DO  - 10.1002/app.1623
ER  - 

@article{
author = "Marković, S and Dunjić, Branko and Zlatanić, Alisa and Đonlagić, Jasna",
year = "2001",
abstract = "The curing reaction of typical commercial phenol-formaldehyde novolac resins with hexamethylentetraamine (HMTA) was followed by dynamic mechanical analysis. The evolution of the rheological parameters, such as storage modulus G ', loss modulus G ", and tan delta (G " /G '), as a function of time, for samples of the phenolic resins on cloth, was recorded. The curing reaction, leading to the formation of a crosslinked structure, is described by a third-order phenomenological equation. This equation takes into account a self-acceleration effect, as a consequence not only of the chemical reaction of crosslinking after the gel point but of phase segregation as well. This rheokinetic model of the curing of phenolic novolac resins permits the determination of the numerical values of the kinetic equation constants. The influence of the composition, structure, and physical treatment on the curing kinetics of the novolac resins is evaluated.",
publisher = "Wiley, Hoboken",
journal = "Journal of Applied Polymer Science",
title = "Dynamic mechanical analysis study of the curing of phenol-formaldehyde novolac resins",
pages = "1913-1902",
number = "8",
volume = "81",
doi = "10.1002/app.1623"
}

Marković, S., Dunjić, B., Zlatanić, A.,& Đonlagić, J.. (2001). Dynamic mechanical analysis study of the curing of phenol-formaldehyde novolac resins. in Journal of Applied Polymer Science
Wiley, Hoboken., 81(8), 1902-1913.
https://doi.org/10.1002/app.1623

Marković S, Dunjić B, Zlatanić A, Đonlagić J. Dynamic mechanical analysis study of the curing of phenol-formaldehyde novolac resins. in Journal of Applied Polymer Science. 2001;81(8):1902-1913.
doi:10.1002/app.1623 .

Marković, S, Dunjić, Branko, Zlatanić, Alisa, Đonlagić, Jasna, "Dynamic mechanical analysis study of the curing of phenol-formaldehyde novolac resins" in Journal of Applied Polymer Science, 81, no. 8 (2001):1902-1913,
https://doi.org/10.1002/app.1623 . .

TY  - JOUR
AU  - Favre-Reguillon, A
AU  - Dunjić, Branko
AU  - Dumont, N
AU  - Lemaire, M
PY  - 2001
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/383
AB  - The extraction of caesium by resorcinol based resins was investigated. At high hydroxide concentration ([OH-] = 0.15 M), the alkali-metal cations' sorption selectivity (determined in competitive extraction system) for resorcinol resins was found to be Cs+  gt  Li+  gt  Rb+  gt  K+  gt  Na+, whereas at pH 7 this selectivity was found to be Cs+  gt  Rb+  gt  K+  gt  gt  Na+ approximate to Li+. Different mechanisms of ion exchange occurring in these phenolic resins can explain this selectivity series. Then different macrocycles were incorporated in the resins. The ionoselective properties of these new ion-exchange resins are strongly influenced by the nature of the crosslinker. The presence of macrocycles lead to an improvement of selectivity towards caesium in relation with the size of the macrocycles introduced.
PB  - Marcel Dekker Inc, New York
T2  - Separation Science and Technology
T1  - Design of ion-exchange resins selective of caesium. Synergistic effect of macrocycle in phenolic resins
EP  - 379
IS  - 3
SP  - 367
VL  - 36
DO  - 10.1081/SS-100102933
ER  - 

@article{
author = "Favre-Reguillon, A and Dunjić, Branko and Dumont, N and Lemaire, M",
year = "2001",
abstract = "The extraction of caesium by resorcinol based resins was investigated. At high hydroxide concentration ([OH-] = 0.15 M), the alkali-metal cations' sorption selectivity (determined in competitive extraction system) for resorcinol resins was found to be Cs+  gt  Li+  gt  Rb+  gt  K+  gt  Na+, whereas at pH 7 this selectivity was found to be Cs+  gt  Rb+  gt  K+  gt  gt  Na+ approximate to Li+. Different mechanisms of ion exchange occurring in these phenolic resins can explain this selectivity series. Then different macrocycles were incorporated in the resins. The ionoselective properties of these new ion-exchange resins are strongly influenced by the nature of the crosslinker. The presence of macrocycles lead to an improvement of selectivity towards caesium in relation with the size of the macrocycles introduced.",
publisher = "Marcel Dekker Inc, New York",
journal = "Separation Science and Technology",
title = "Design of ion-exchange resins selective of caesium. Synergistic effect of macrocycle in phenolic resins",
pages = "379-367",
number = "3",
volume = "36",
doi = "10.1081/SS-100102933"
}

Favre-Reguillon, A., Dunjić, B., Dumont, N.,& Lemaire, M.. (2001). Design of ion-exchange resins selective of caesium. Synergistic effect of macrocycle in phenolic resins. in Separation Science and Technology
Marcel Dekker Inc, New York., 36(3), 367-379.
https://doi.org/10.1081/SS-100102933

Favre-Reguillon A, Dunjić B, Dumont N, Lemaire M. Design of ion-exchange resins selective of caesium. Synergistic effect of macrocycle in phenolic resins. in Separation Science and Technology. 2001;36(3):367-379.
doi:10.1081/SS-100102933 .

Favre-Reguillon, A, Dunjić, Branko, Dumont, N, Lemaire, M, "Design of ion-exchange resins selective of caesium. Synergistic effect of macrocycle in phenolic resins" in Separation Science and Technology, 36, no. 3 (2001):367-379,
https://doi.org/10.1081/SS-100102933 . .

TY  - JOUR
AU  - Favre-Reguillon, A
AU  - Dunjić, Branko
AU  - Lemaire, M
AU  - Chomel, R
PY  - 2001
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/361
AB  - Control of the reaction conditions during the alkaline polycondensation of resorcinol with formaldehyde leads to polymeric resins with improved capacity toward caesium. The resins obtained are characterized by determining their moisture regain and ion-exchange capacity. The distribution coefficient (D) for alkali-metal cations are determined in a competitive extraction system at different pH. The alkali-metal cation sorption selectivity series is strongly influenced by the pH of the solution. Two kinds of mechanism can explain these selectivity series. Extraction of caesium from simulated radioactive waste was studied at different pH in the presence of a large excess of sodium. The study also includes the kinetic and the ion-exchange capacity for caesium of the sodium form of the resins.
PB  - Marcel Dekker Inc, New York
T2  - Solvent Extraction and Ion Exchange
T1  - Synthesis and evaluation of resorcinol-based ion-exchange resins for the selective removal of cesium
EP  - 191
IS  - 1
SP  - 181
VL  - 19
DO  - 10.1081/SEI-100001382
ER  - 

@article{
author = "Favre-Reguillon, A and Dunjić, Branko and Lemaire, M and Chomel, R",
year = "2001",
abstract = "Control of the reaction conditions during the alkaline polycondensation of resorcinol with formaldehyde leads to polymeric resins with improved capacity toward caesium. The resins obtained are characterized by determining their moisture regain and ion-exchange capacity. The distribution coefficient (D) for alkali-metal cations are determined in a competitive extraction system at different pH. The alkali-metal cation sorption selectivity series is strongly influenced by the pH of the solution. Two kinds of mechanism can explain these selectivity series. Extraction of caesium from simulated radioactive waste was studied at different pH in the presence of a large excess of sodium. The study also includes the kinetic and the ion-exchange capacity for caesium of the sodium form of the resins.",
publisher = "Marcel Dekker Inc, New York",
journal = "Solvent Extraction and Ion Exchange",
title = "Synthesis and evaluation of resorcinol-based ion-exchange resins for the selective removal of cesium",
pages = "191-181",
number = "1",
volume = "19",
doi = "10.1081/SEI-100001382"
}

Favre-Reguillon, A., Dunjić, B., Lemaire, M.,& Chomel, R.. (2001). Synthesis and evaluation of resorcinol-based ion-exchange resins for the selective removal of cesium. in Solvent Extraction and Ion Exchange
Marcel Dekker Inc, New York., 19(1), 181-191.
https://doi.org/10.1081/SEI-100001382

Favre-Reguillon A, Dunjić B, Lemaire M, Chomel R. Synthesis and evaluation of resorcinol-based ion-exchange resins for the selective removal of cesium. in Solvent Extraction and Ion Exchange. 2001;19(1):181-191.
doi:10.1081/SEI-100001382 .

Favre-Reguillon, A, Dunjić, Branko, Lemaire, M, Chomel, R, "Synthesis and evaluation of resorcinol-based ion-exchange resins for the selective removal of cesium" in Solvent Extraction and Ion Exchange, 19, no. 1 (2001):181-191,
https://doi.org/10.1081/SEI-100001382 . .

TY  - JOUR
AU  - Đonlagić, Jasna
AU  - Zlatanić, Alisa
AU  - Dunjić, Branko
AU  - Marković, Slobodanka
PY  - 2000
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/315
AB  - The rheokinetics of the curing of thermoset polymers, such as acrylate-terminated unsaturated polyesters, polyurethanes based on unsaturated polyesters and phenol-formaldehyde resins, was studied by rheological analysis. The evalution of the rheological parameters, such as storage modulus G' and loss modulus G', was recorded. In all cases, the entire polymerization process was presented as G' versus time curves all of which had a characteristic 'S' shapes, indicating autoacceleration of the crosslinking reaction during the formation of the polymer network. Rheokinetic models of the process of network formation of the thermosets were proposed to confirm the autocatalytic character of these reactions, as well as to determine the numerical values of the constants of the rheokinetic equation and the degree of rheological conversion as a function of time. Here it is important to note that the phenomenon of self-acceleration is common to all these different thermoset systems and that the mechanism of self-acceleration results from phase separation and reaction acceleration due to an increased concentration of the reactive groups in the separate microgel phase. The results from the rheokinetic models reveal good agreement with the experimental data over the entire conversion. The information obtained from dynamic mechanical analysis shows that the mechanism of the curing process is essentially determined by the structural parameters of thermosetting polymers.
AB  - Za izučavanje umrežavanja termoočvršćavajućih polimera kao što su nezasićeni poliestri sa završnim akrilatnim grupama, poliuretani na bazi nezasićenih poliestara i fenol-formaldehidne smole korišćena je reološka analiza. Reakcija umrežavanja polimera praćena je preko promene reoloških parametara kao što su modul sačuvane energije G' i modul izgubljene energije G' i tgδ u ogledima smicanja između paralelnih ploča ili u ogledima uvijanja. U svim slučajevima, promena modula sačuvane energije od vremena pokazuje karakterističan 'S' oblik, što je posledica samoubrzavanje reakcije umrežavanja. Važno je naglasiti da je efekat samoubrzavanja zajednički za sve ispitane termočvršćavajuće smole i da se efekat samoubrzanja javlja kao posledica ne samo hemijske reakcije formiranja poprečnih veza u oblasti posle nastajanja gela već i promene morfologije. Predloženi reokinetički modeli umrežavanja termoočvtšćavajućih smola omogućili su određivanje brojčanih vrednosti konstanti brzine reakcije, kao i konstante samoubrzavanja i zavisnosti reološke konverzije od vremena. Rezultati dobijeni iz reokinetičkih modela pokazuju dobro slaganje sa eksperimentalnim rezultatima u čitavom opsegu konverzije. Informacije dobijene iz dinamičko-mehaničke analize pokazuju da je mehanizam umrežavanja određen elementima strukture termoočvršćavajućih smola. Izučavani su uticaj prisustva dvostrukih veza na krajevima lanaca i duž osnovnih lanaca kao i njihove konfiguracije na sam proces umrežavanja nezasićenih poliestara. A na seriji nezasićenih stereoregularnih teleheličnih poliestara maleinske kiseline sa završnim hidroksilnim grupama praćena je reokinetika obrazovanja poliuretana pomoću triizocijanata. Takodje je analiziran uticaj hemijskog sastava odnosno strukture na seriji statističkih i novolačnih fenolnih smola sa visokim sadržajem orto-orto položaja na reakciju umrežavanja sa heksametilentetraaminom.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Rheological study of the network formation of thermosetting polymers
T1  - Reološko izučavanje umrežavanja termoočvršćavajućih polimera
EP  - 437
IS  - 10
SP  - 428
VL  - 54
UR  - https://hdl.handle.net/21.15107/rcub_technorep_315
ER  - 

@article{
author = "Đonlagić, Jasna and Zlatanić, Alisa and Dunjić, Branko and Marković, Slobodanka",
year = "2000",
abstract = "The rheokinetics of the curing of thermoset polymers, such as acrylate-terminated unsaturated polyesters, polyurethanes based on unsaturated polyesters and phenol-formaldehyde resins, was studied by rheological analysis. The evalution of the rheological parameters, such as storage modulus G' and loss modulus G', was recorded. In all cases, the entire polymerization process was presented as G' versus time curves all of which had a characteristic 'S' shapes, indicating autoacceleration of the crosslinking reaction during the formation of the polymer network. Rheokinetic models of the process of network formation of the thermosets were proposed to confirm the autocatalytic character of these reactions, as well as to determine the numerical values of the constants of the rheokinetic equation and the degree of rheological conversion as a function of time. Here it is important to note that the phenomenon of self-acceleration is common to all these different thermoset systems and that the mechanism of self-acceleration results from phase separation and reaction acceleration due to an increased concentration of the reactive groups in the separate microgel phase. The results from the rheokinetic models reveal good agreement with the experimental data over the entire conversion. The information obtained from dynamic mechanical analysis shows that the mechanism of the curing process is essentially determined by the structural parameters of thermosetting polymers., Za izučavanje umrežavanja termoočvršćavajućih polimera kao što su nezasićeni poliestri sa završnim akrilatnim grupama, poliuretani na bazi nezasićenih poliestara i fenol-formaldehidne smole korišćena je reološka analiza. Reakcija umrežavanja polimera praćena je preko promene reoloških parametara kao što su modul sačuvane energije G' i modul izgubljene energije G' i tgδ u ogledima smicanja između paralelnih ploča ili u ogledima uvijanja. U svim slučajevima, promena modula sačuvane energije od vremena pokazuje karakterističan 'S' oblik, što je posledica samoubrzavanje reakcije umrežavanja. Važno je naglasiti da je efekat samoubrzavanja zajednički za sve ispitane termočvršćavajuće smole i da se efekat samoubrzanja javlja kao posledica ne samo hemijske reakcije formiranja poprečnih veza u oblasti posle nastajanja gela već i promene morfologije. Predloženi reokinetički modeli umrežavanja termoočvtšćavajućih smola omogućili su određivanje brojčanih vrednosti konstanti brzine reakcije, kao i konstante samoubrzavanja i zavisnosti reološke konverzije od vremena. Rezultati dobijeni iz reokinetičkih modela pokazuju dobro slaganje sa eksperimentalnim rezultatima u čitavom opsegu konverzije. Informacije dobijene iz dinamičko-mehaničke analize pokazuju da je mehanizam umrežavanja određen elementima strukture termoočvršćavajućih smola. Izučavani su uticaj prisustva dvostrukih veza na krajevima lanaca i duž osnovnih lanaca kao i njihove konfiguracije na sam proces umrežavanja nezasićenih poliestara. A na seriji nezasićenih stereoregularnih teleheličnih poliestara maleinske kiseline sa završnim hidroksilnim grupama praćena je reokinetika obrazovanja poliuretana pomoću triizocijanata. Takodje je analiziran uticaj hemijskog sastava odnosno strukture na seriji statističkih i novolačnih fenolnih smola sa visokim sadržajem orto-orto položaja na reakciju umrežavanja sa heksametilentetraaminom.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Rheological study of the network formation of thermosetting polymers, Reološko izučavanje umrežavanja termoočvršćavajućih polimera",
pages = "437-428",
number = "10",
volume = "54",
url = "https://hdl.handle.net/21.15107/rcub_technorep_315"
}

Đonlagić, J., Zlatanić, A., Dunjić, B.,& Marković, S.. (2000). Rheological study of the network formation of thermosetting polymers. in Hemijska industrija
Association of Chemical Engineers of Serbia., 54(10), 428-437.
https://hdl.handle.net/21.15107/rcub_technorep_315

Đonlagić J, Zlatanić A, Dunjić B, Marković S. Rheological study of the network formation of thermosetting polymers. in Hemijska industrija. 2000;54(10):428-437.
https://hdl.handle.net/21.15107/rcub_technorep_315 .

Đonlagić, Jasna, Zlatanić, Alisa, Dunjić, Branko, Marković, Slobodanka, "Rheological study of the network formation of thermosetting polymers" in Hemijska industrija, 54, no. 10 (2000):428-437,
https://hdl.handle.net/21.15107/rcub_technorep_315 .

TY  - JOUR
AU  - Marković, Slobodanka
AU  - Đonlagić, Jasna
AU  - Zakrzewska, Joanna
AU  - Dunjić, Branko
PY  - 1999
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/237
AB  - C-13-NMR spectroscopy and gel-permeation chromatography studies were carried out on different samples of typical commercial phenol-formaldehyde novolac resins. Six random novolac resins (NLO 1-6), with decreasing ratios of phenol/formaldehyde from 1:0.75 to 1:0.85, were prepared in the presence of oxalic acid at two different concentratons. A high-ortho novolac resin (NL-OO') was synthesized in the pH range 4-6 using zinc acetate (Zn(OAc)(2)), as catalyst. An improved description of the chemical structure, in terms of composition, the number of free para- and ortho-positions, the isomeric distribution, the degree of polymerization, the number average molecular weight, the degree of branching and molecular weight distribution, was obtained.
PB  - Serbian Chemical Society, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Study of the structure of phenol-formaldehyde novolac resins by NMR spectroscopy and gel-permeation chromatography
EP  - 189
IS  - 3
SP  - 177
VL  - 64
UR  - https://hdl.handle.net/21.15107/rcub_technorep_237
ER  - 

@article{
author = "Marković, Slobodanka and Đonlagić, Jasna and Zakrzewska, Joanna and Dunjić, Branko",
year = "1999",
abstract = "C-13-NMR spectroscopy and gel-permeation chromatography studies were carried out on different samples of typical commercial phenol-formaldehyde novolac resins. Six random novolac resins (NLO 1-6), with decreasing ratios of phenol/formaldehyde from 1:0.75 to 1:0.85, were prepared in the presence of oxalic acid at two different concentratons. A high-ortho novolac resin (NL-OO') was synthesized in the pH range 4-6 using zinc acetate (Zn(OAc)(2)), as catalyst. An improved description of the chemical structure, in terms of composition, the number of free para- and ortho-positions, the isomeric distribution, the degree of polymerization, the number average molecular weight, the degree of branching and molecular weight distribution, was obtained.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Study of the structure of phenol-formaldehyde novolac resins by NMR spectroscopy and gel-permeation chromatography",
pages = "189-177",
number = "3",
volume = "64",
url = "https://hdl.handle.net/21.15107/rcub_technorep_237"
}

Marković, S., Đonlagić, J., Zakrzewska, J.,& Dunjić, B.. (1999). Study of the structure of phenol-formaldehyde novolac resins by NMR spectroscopy and gel-permeation chromatography. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 64(3), 177-189.
https://hdl.handle.net/21.15107/rcub_technorep_237

Marković S, Đonlagić J, Zakrzewska J, Dunjić B. Study of the structure of phenol-formaldehyde novolac resins by NMR spectroscopy and gel-permeation chromatography. in Journal of the Serbian Chemical Society. 1999;64(3):177-189.
https://hdl.handle.net/21.15107/rcub_technorep_237 .

Marković, Slobodanka, Đonlagić, Jasna, Zakrzewska, Joanna, Dunjić, Branko, "Study of the structure of phenol-formaldehyde novolac resins by NMR spectroscopy and gel-permeation chromatography" in Journal of the Serbian Chemical Society, 64, no. 3 (1999):177-189,
https://hdl.handle.net/21.15107/rcub_technorep_237 .

TY  - JOUR
AU  - Zlatanić, Alisa
AU  - Dunjić, Branko
AU  - Đonlagić, Jasna
PY  - 1999
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/235
AB  - The free radical copolymerization reaction of three series of acrylate-terminated unsaturated polyesters with styrene, using benzoyl peroxide/N,N-dimethylaniline as the redox initiator system, was followed by dynamic mechanical analysis. The presence of double bonds at both chain ends allows the formation of a regular network during the crosslinking copolymerization with styrene. The evolution of the rheological parameters, such as storage modulus G' and loss modulus G ", was recorded. The polymerization reaction, leading to the formation of a crosslinked structure, is described by a second order phenomenological equation, which takes into account a self-acceleration effect, as a consequence of not only the chemical reaction of crosslinking after the gel point but also phase segregation. This rheokinetic model of curing acrylate-terminated polyesters permits the determination of the numerical values of the kinetic equation constants and the degree of rheological conversion as a function of cure time. The influence of the terminal double bonds as well as of the cis-trans configuration on the curing kinetics of the unsaturated copolyesters was evaluated.
PB  - Wiley-VCH Verlag Gmbh, Weinheim
T2  - Macromolecular Chemistry and Physics
T1  - Rheological study of the copolymerization reaction of acrylate-terminated unsaturated copolyesters with styrene
EP  - 2058
IS  - 9
SP  - 2048
VL  - 200
DO  - 10.1002/(sici)1521-3935(19990901)200:92048::aid-macp20483.3.co;2-m
ER  - 

@article{
author = "Zlatanić, Alisa and Dunjić, Branko and Đonlagić, Jasna",
year = "1999",
abstract = "The free radical copolymerization reaction of three series of acrylate-terminated unsaturated polyesters with styrene, using benzoyl peroxide/N,N-dimethylaniline as the redox initiator system, was followed by dynamic mechanical analysis. The presence of double bonds at both chain ends allows the formation of a regular network during the crosslinking copolymerization with styrene. The evolution of the rheological parameters, such as storage modulus G' and loss modulus G ", was recorded. The polymerization reaction, leading to the formation of a crosslinked structure, is described by a second order phenomenological equation, which takes into account a self-acceleration effect, as a consequence of not only the chemical reaction of crosslinking after the gel point but also phase segregation. This rheokinetic model of curing acrylate-terminated polyesters permits the determination of the numerical values of the kinetic equation constants and the degree of rheological conversion as a function of cure time. The influence of the terminal double bonds as well as of the cis-trans configuration on the curing kinetics of the unsaturated copolyesters was evaluated.",
publisher = "Wiley-VCH Verlag Gmbh, Weinheim",
journal = "Macromolecular Chemistry and Physics",
title = "Rheological study of the copolymerization reaction of acrylate-terminated unsaturated copolyesters with styrene",
pages = "2058-2048",
number = "9",
volume = "200",
doi = "10.1002/(sici)1521-3935(19990901)200:92048::aid-macp20483.3.co;2-m"
}

Zlatanić, A., Dunjić, B.,& Đonlagić, J.. (1999). Rheological study of the copolymerization reaction of acrylate-terminated unsaturated copolyesters with styrene. in Macromolecular Chemistry and Physics
Wiley-VCH Verlag Gmbh, Weinheim., 200(9), 2048-2058.
https://doi.org/10.1002/(sici)1521-3935(19990901)200:92048::aid-macp20483.3.co;2-m

Zlatanić A, Dunjić B, Đonlagić J. Rheological study of the copolymerization reaction of acrylate-terminated unsaturated copolyesters with styrene. in Macromolecular Chemistry and Physics. 1999;200(9):2048-2058.
doi:10.1002/(sici)1521-3935(19990901)200:92048::aid-macp20483.3.co;2-m .

Zlatanić, Alisa, Dunjić, Branko, Đonlagić, Jasna, "Rheological study of the copolymerization reaction of acrylate-terminated unsaturated copolyesters with styrene" in Macromolecular Chemistry and Physics, 200, no. 9 (1999):2048-2058,
https://doi.org/10.1002/(sici)1521-3935(19990901)200:92048::aid-macp20483.3.co;2-m . .