TY  - JOUR
AU  - Ponjavić, Marijana
AU  - Nikolić, Marija S.
AU  - Jevtić, Sanja
AU  - Jeremić, Sanja
AU  - Đokić, Lidija
AU  - Đonlagić, Jasna
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5233
AB  - The present study reports the potential application of star-shaped poly(ε-caprolactones) with different number of arms as new drug delivery matrix. Linear and star-shaped PCL ibuprofen loaded microspheres were prepared using oil-in-water (o/w) solvent evaporation technique and characterized with FTIR, DSC, XRD and SEM analysis. High yield, encapsulation efficiency and drug loadings were obtained for all microspheres. FTIR analysis revealed the existence of interactions between polymer matrix and drug, while the DSC analysis suggested that drug was encapsulated in an amorphous form. SEM analysis confirmed that regular, spherical in shape star-shaped microspheres, with diameter between 80 and 90 μm, were obtained, while quite larger microspheres, 110 μm, were prepared from linear PCL. The advantage of using star-shaped PCL microspheres instead of linear PCL was seen from drug release profiles which demonstrated higher amount of drug released from star-shaped polymer matrix as a consequence of their branched, flexible structure. Microspheres prepared from the polymers with the most branched structure showed the highest amount of the released drug after 24 h. Finally, cytotoxicity tests, performed using normal human fibroblasts (MRC5), indicated the absence of cytotoxicity at lower concentrations of microspheres proving the great potential of star-shaped PCL systems in comparison to linear ones.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Star-shaped poly(ε-caprolactones) with well-defined architecture as potential drug carriers
T1  - РАЗГРАНАТИ ПОЛИ(ε-КАПРОЛАКТОНИ) СА ДОБРО ОДРЕЂЕНОМ АРХИТЕКТУРОМ КАО ПОТЕНЦИЈАЛНИ НОСАЧИ ЛЕКОВА
EP  - 1090
IS  - 9
SP  - 1075
VL  - 87
DO  - 10.2298/JSC220202032P
ER  - 

@article{
author = "Ponjavić, Marijana and Nikolić, Marija S. and Jevtić, Sanja and Jeremić, Sanja and Đokić, Lidija and Đonlagić, Jasna",
year = "2022",
abstract = "The present study reports the potential application of star-shaped poly(ε-caprolactones) with different number of arms as new drug delivery matrix. Linear and star-shaped PCL ibuprofen loaded microspheres were prepared using oil-in-water (o/w) solvent evaporation technique and characterized with FTIR, DSC, XRD and SEM analysis. High yield, encapsulation efficiency and drug loadings were obtained for all microspheres. FTIR analysis revealed the existence of interactions between polymer matrix and drug, while the DSC analysis suggested that drug was encapsulated in an amorphous form. SEM analysis confirmed that regular, spherical in shape star-shaped microspheres, with diameter between 80 and 90 μm, were obtained, while quite larger microspheres, 110 μm, were prepared from linear PCL. The advantage of using star-shaped PCL microspheres instead of linear PCL was seen from drug release profiles which demonstrated higher amount of drug released from star-shaped polymer matrix as a consequence of their branched, flexible structure. Microspheres prepared from the polymers with the most branched structure showed the highest amount of the released drug after 24 h. Finally, cytotoxicity tests, performed using normal human fibroblasts (MRC5), indicated the absence of cytotoxicity at lower concentrations of microspheres proving the great potential of star-shaped PCL systems in comparison to linear ones.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Star-shaped poly(ε-caprolactones) with well-defined architecture as potential drug carriers, РАЗГРАНАТИ ПОЛИ(ε-КАПРОЛАКТОНИ) СА ДОБРО ОДРЕЂЕНОМ АРХИТЕКТУРОМ КАО ПОТЕНЦИЈАЛНИ НОСАЧИ ЛЕКОВА",
pages = "1090-1075",
number = "9",
volume = "87",
doi = "10.2298/JSC220202032P"
}

Ponjavić, M., Nikolić, M. S., Jevtić, S., Jeremić, S., Đokić, L.,& Đonlagić, J.. (2022). Star-shaped poly(ε-caprolactones) with well-defined architecture as potential drug carriers. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 87(9), 1075-1090.
https://doi.org/10.2298/JSC220202032P

Ponjavić M, Nikolić MS, Jevtić S, Jeremić S, Đokić L, Đonlagić J. Star-shaped poly(ε-caprolactones) with well-defined architecture as potential drug carriers. in Journal of the Serbian Chemical Society. 2022;87(9):1075-1090.
doi:10.2298/JSC220202032P .

Ponjavić, Marijana, Nikolić, Marija S., Jevtić, Sanja, Jeremić, Sanja, Đokić, Lidija, Đonlagić, Jasna, "Star-shaped poly(ε-caprolactones) with well-defined architecture as potential drug carriers" in Journal of the Serbian Chemical Society, 87, no. 9 (2022):1075-1090,
https://doi.org/10.2298/JSC220202032P . .

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  - Ponjavić, Marijana
AU  - Nikolić, Marija
AU  - Stevanović, Sanja
AU  - Nikodinović-Runić, Jasmina
AU  - Jeremić, Sanja
AU  - Pavić, Aleksandar
AU  - Đonlagić, Jasna
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4394
AB  - Star-shaped polymers of biodegradable aliphatic polyester, poly(epsilon-caprolactone), PCL, with different number of arms (three, four, and six) were synthesized by ring-opening polymerization initiated by multifunctional alcohols used as cores. As potential biomaterials, synthesized star-shaped poly(epsilon-caprolactone)s,sPCL, were thoroughly characterized in terms of their degradation under different pH conditions and in respect to their cytotoxicity. The in vitro degradation was performed in phosphate buffer (pH 7.4) and hydrochloric acid solution (pH 1.0) over 5 weeks. Degradation ofsPCL films was followed by the weight loss measurements, GPC, FTIR, and AFM analysis. While the most of the samples were stable against the abiotic hydrolysis at pH 7.4 after 5 weeks of degradation, degradation was significantly accelerated in the acidic medium. Degradation rate of polymer films was affected by the polymer architecture and molecular weight. The molecular weight profiles during the degradation revealed random chain scission of the ester bonds indicating bulk degradation mechanism of hydrolysis at pH 7.4, while acidic hydrolysis proceeded through the bulk degradation associated with surface erosion, confirmed by AFM. The in vitro toxicity tests, cytotoxicity applying normal human fibroblasts (MRC5) and embryotoxicity assessment (using zebra fish model,Danio rerio), suggested those polymeric materials as suitable for biomedical application.
PB  - Sage Publications Ltd, London
T2  - Journal of Bioactive and Compatible Polymers
T1  - Hydrolytic degradation of star-shaped poly(epsilon-caprolactone)s with different number of arms and their cytotoxic effects
EP  - 537
IS  - 6
SP  - 517
VL  - 35
DO  - 10.1177/0883911520951826
ER  - 

@article{
author = "Ponjavić, Marijana and Nikolić, Marija and Stevanović, Sanja and Nikodinović-Runić, Jasmina and Jeremić, Sanja and Pavić, Aleksandar and Đonlagić, Jasna",
year = "2020",
abstract = "Star-shaped polymers of biodegradable aliphatic polyester, poly(epsilon-caprolactone), PCL, with different number of arms (three, four, and six) were synthesized by ring-opening polymerization initiated by multifunctional alcohols used as cores. As potential biomaterials, synthesized star-shaped poly(epsilon-caprolactone)s,sPCL, were thoroughly characterized in terms of their degradation under different pH conditions and in respect to their cytotoxicity. The in vitro degradation was performed in phosphate buffer (pH 7.4) and hydrochloric acid solution (pH 1.0) over 5 weeks. Degradation ofsPCL films was followed by the weight loss measurements, GPC, FTIR, and AFM analysis. While the most of the samples were stable against the abiotic hydrolysis at pH 7.4 after 5 weeks of degradation, degradation was significantly accelerated in the acidic medium. Degradation rate of polymer films was affected by the polymer architecture and molecular weight. The molecular weight profiles during the degradation revealed random chain scission of the ester bonds indicating bulk degradation mechanism of hydrolysis at pH 7.4, while acidic hydrolysis proceeded through the bulk degradation associated with surface erosion, confirmed by AFM. The in vitro toxicity tests, cytotoxicity applying normal human fibroblasts (MRC5) and embryotoxicity assessment (using zebra fish model,Danio rerio), suggested those polymeric materials as suitable for biomedical application.",
publisher = "Sage Publications Ltd, London",
journal = "Journal of Bioactive and Compatible Polymers",
title = "Hydrolytic degradation of star-shaped poly(epsilon-caprolactone)s with different number of arms and their cytotoxic effects",
pages = "537-517",
number = "6",
volume = "35",
doi = "10.1177/0883911520951826"
}

Ponjavić, M., Nikolić, M., Stevanović, S., Nikodinović-Runić, J., Jeremić, S., Pavić, A.,& Đonlagić, J.. (2020). Hydrolytic degradation of star-shaped poly(epsilon-caprolactone)s with different number of arms and their cytotoxic effects. in Journal of Bioactive and Compatible Polymers
Sage Publications Ltd, London., 35(6), 517-537.
https://doi.org/10.1177/0883911520951826

Ponjavić M, Nikolić M, Stevanović S, Nikodinović-Runić J, Jeremić S, Pavić A, Đonlagić J. Hydrolytic degradation of star-shaped poly(epsilon-caprolactone)s with different number of arms and their cytotoxic effects. in Journal of Bioactive and Compatible Polymers. 2020;35(6):517-537.
doi:10.1177/0883911520951826 .

Ponjavić, Marijana, Nikolić, Marija, Stevanović, Sanja, Nikodinović-Runić, Jasmina, Jeremić, Sanja, Pavić, Aleksandar, Đonlagić, Jasna, "Hydrolytic degradation of star-shaped poly(epsilon-caprolactone)s with different number of arms and their cytotoxic effects" in Journal of Bioactive and Compatible Polymers, 35, no. 6 (2020):517-537,
https://doi.org/10.1177/0883911520951826 . .

TY  - JOUR
AU  - Mirković, Ilinka
AU  - Nikolić, Marija
AU  - Ostojić, Sanja
AU  - Maletaškić, Jelena
AU  - Petrović, Zoran
AU  - Đonlagić, Jasna
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4365
AB  - Semi-interpenetrating polymer networks (SIPN) based on thermo-responsive poly(N-isopropylacrylamide) (PNIPA) and water-soluble sodium salts of linear hyaluronic acid (Na-HA) were physically cross-linked with synthetic nanoclay (laponite XLG). PNIPA hydrogels with different cross-linking densities and Na-HA concentrations were synthesized by in situ free-radical redox polymerization. The structure and heterogeneity of the semi-IPN hydrogels were examined by SEM and XRD. The content of clay incorporated in the gel was determined by TGA. DSC measurements showed that volume phase transition temperature and its enthalpy varied with the clay and hyaluronic acid content. SIPN hydrogels containing negatively charged polyelectrolyte, Na-HA, exhibited higher Q(e) and faster deswelling rates than the corresponding PNIPA NC hydrogels. The presence of the anionic Na-HA polymer reduced the storage modulus, indicating a weakening of the hydrogel network structure, especially at lower clay contents. The nanocomposite hydrogels exhibited high tan delta values, which increased with increasing Na-HA content.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Thermo-responsive hydrogels based on poly(N-isopropyl- acrylamide) and hyaluronic acid cross-linked with nanoclays
EP  - 1221
IS  - 9
SP  - 1197
VL  - 85
DO  - 10.2298/JSC200109023M
ER  - 

@article{
author = "Mirković, Ilinka and Nikolić, Marija and Ostojić, Sanja and Maletaškić, Jelena and Petrović, Zoran and Đonlagić, Jasna",
year = "2020",
abstract = "Semi-interpenetrating polymer networks (SIPN) based on thermo-responsive poly(N-isopropylacrylamide) (PNIPA) and water-soluble sodium salts of linear hyaluronic acid (Na-HA) were physically cross-linked with synthetic nanoclay (laponite XLG). PNIPA hydrogels with different cross-linking densities and Na-HA concentrations were synthesized by in situ free-radical redox polymerization. The structure and heterogeneity of the semi-IPN hydrogels were examined by SEM and XRD. The content of clay incorporated in the gel was determined by TGA. DSC measurements showed that volume phase transition temperature and its enthalpy varied with the clay and hyaluronic acid content. SIPN hydrogels containing negatively charged polyelectrolyte, Na-HA, exhibited higher Q(e) and faster deswelling rates than the corresponding PNIPA NC hydrogels. The presence of the anionic Na-HA polymer reduced the storage modulus, indicating a weakening of the hydrogel network structure, especially at lower clay contents. The nanocomposite hydrogels exhibited high tan delta values, which increased with increasing Na-HA content.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Thermo-responsive hydrogels based on poly(N-isopropyl- acrylamide) and hyaluronic acid cross-linked with nanoclays",
pages = "1221-1197",
number = "9",
volume = "85",
doi = "10.2298/JSC200109023M"
}

Mirković, I., Nikolić, M., Ostojić, S., Maletaškić, J., Petrović, Z.,& Đonlagić, J.. (2020). Thermo-responsive hydrogels based on poly(N-isopropyl- acrylamide) and hyaluronic acid cross-linked with nanoclays. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 85(9), 1197-1221.
https://doi.org/10.2298/JSC200109023M

Mirković I, Nikolić M, Ostojić S, Maletaškić J, Petrović Z, Đonlagić J. Thermo-responsive hydrogels based on poly(N-isopropyl- acrylamide) and hyaluronic acid cross-linked with nanoclays. in Journal of the Serbian Chemical Society. 2020;85(9):1197-1221.
doi:10.2298/JSC200109023M .

Mirković, Ilinka, Nikolić, Marija, Ostojić, Sanja, Maletaškić, Jelena, Petrović, Zoran, Đonlagić, Jasna, "Thermo-responsive hydrogels based on poly(N-isopropyl- acrylamide) and hyaluronic acid cross-linked with nanoclays" in Journal of the Serbian Chemical Society, 85, no. 9 (2020):1197-1221,
https://doi.org/10.2298/JSC200109023M . .

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  - Ponjavić, Marijana
AU  - Nikolić, Marija
AU  - Nikodinović-Runić, Jasmina
AU  - Ilić-Tomić, Tatjana
AU  - Đonlagić, Jasna
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4175
AB  - In order to create a new drug delivery system, the ibuprofen-loaded triblock copolymer PCL/PEO/PCL (PCEC) microspheres with a low PEO content ( lt 2 wt%) were prepared by oil in water (o/w) solvent evaporation technique. The influence of PEO content, molecular weight of a polymer matrix and drug loading on the ibuprofen release profiles were evaluated. The interactions between polymer matrix and ibuprofen were detected by FTIR analysis. The presence of hydrophilic PEO segment in PCL chains caused the decrease in particle size, which further had a great impact on the drug release kinetics, i.e., initially faster release and significantly higher quantity of released drug compared to neat PCL. Ibuprofen release behavior from polymer matrix was governed by a diffusion process. In vitro cytotoxicity tests revealed that empty PCL and PCEC microspheres were not toxic at low concentrations, while ibuprofen-loaded microspheres exhibited cytotoxicity correlated with amounts of incorporated drug.
PB  - Taylor & Francis As, Oslo
T2  - International Journal of Polymeric Materials and Polymeric Biomaterials
T1  - Controlled drug release carriers based on PCL/PEO/PCL block copolymers
EP  - 318
IS  - 6
SP  - 308
VL  - 68
DO  - 10.1080/00914037.2018.1445631
ER  - 

@article{
author = "Ponjavić, Marijana and Nikolić, Marija and Nikodinović-Runić, Jasmina and Ilić-Tomić, Tatjana and Đonlagić, Jasna",
year = "2019",
abstract = "In order to create a new drug delivery system, the ibuprofen-loaded triblock copolymer PCL/PEO/PCL (PCEC) microspheres with a low PEO content ( lt 2 wt%) were prepared by oil in water (o/w) solvent evaporation technique. The influence of PEO content, molecular weight of a polymer matrix and drug loading on the ibuprofen release profiles were evaluated. The interactions between polymer matrix and ibuprofen were detected by FTIR analysis. The presence of hydrophilic PEO segment in PCL chains caused the decrease in particle size, which further had a great impact on the drug release kinetics, i.e., initially faster release and significantly higher quantity of released drug compared to neat PCL. Ibuprofen release behavior from polymer matrix was governed by a diffusion process. In vitro cytotoxicity tests revealed that empty PCL and PCEC microspheres were not toxic at low concentrations, while ibuprofen-loaded microspheres exhibited cytotoxicity correlated with amounts of incorporated drug.",
publisher = "Taylor & Francis As, Oslo",
journal = "International Journal of Polymeric Materials and Polymeric Biomaterials",
title = "Controlled drug release carriers based on PCL/PEO/PCL block copolymers",
pages = "318-308",
number = "6",
volume = "68",
doi = "10.1080/00914037.2018.1445631"
}

Ponjavić, M., Nikolić, M., Nikodinović-Runić, J., Ilić-Tomić, T.,& Đonlagić, J.. (2019). Controlled drug release carriers based on PCL/PEO/PCL block copolymers. in International Journal of Polymeric Materials and Polymeric Biomaterials
Taylor & Francis As, Oslo., 68(6), 308-318.
https://doi.org/10.1080/00914037.2018.1445631

Ponjavić M, Nikolić M, Nikodinović-Runić J, Ilić-Tomić T, Đonlagić J. Controlled drug release carriers based on PCL/PEO/PCL block copolymers. in International Journal of Polymeric Materials and Polymeric Biomaterials. 2019;68(6):308-318.
doi:10.1080/00914037.2018.1445631 .

Ponjavić, Marijana, Nikolić, Marija, Nikodinović-Runić, Jasmina, Ilić-Tomić, Tatjana, Đonlagić, Jasna, "Controlled drug release carriers based on PCL/PEO/PCL block copolymers" in International Journal of Polymeric Materials and Polymeric Biomaterials, 68, no. 6 (2019):308-318,
https://doi.org/10.1080/00914037.2018.1445631 . .

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  - Ponjavić, Marijana
AU  - Nikolić, Marija
AU  - Jeremić, Sanja
AU  - Đokić, Lidija
AU  - Nikodinović-Runić, Jasmina
AU  - Ćosović, Vladan
AU  - Đonlagić, Jasna
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4002
AB  - Hydrolytic, enzymatic degradation and composting under controlled conditions of series of triblock PCL/PEO copolymers, PCEC, with central short PEO block (M (n) 400 g/mol) are presented and compared with homopolymer (PCL). The PCEC copolymers, synthesized via ring-opening polymerization of epsilon-caprolactone, were characterized by H-1 NMR, quantitative C-13 NMR, GPC, DSC and WAXS. The introduction of the PEO central segment ( lt  2 wt%) in PCL chains significantly affected thermal degradation and crystallization behavior, while the hydrophobicity was slightly reduced as confirmed by water absorption and moisture uptake experiments. Hydrolytic degradation studies in phosphate buffer after 8 weeks indicated a small weight loss, while FTIR analysis detected changes in crystallinity indexes and GPC measurements revealed bulk degradation. Enzymatic degradation tested by cell-free extracts containing Pseudomonas aeruginosa PAO1 confirmed high enzyme activity throughout the surface causing morphological changes detected by optical microscopy and AFM analysis. The changes in roughness of polymer films revealed surface erosion mechanism of enzymatic degradation. Copolymer with the highest content of PEO segment and the lowest molecular weight showed better degradation ability compared to PCL and other copolymers. Furthermore, composting of polymer films in a model compost system at 37 A degrees C resulted in significant degradation of the all synthesized block copolymers.
PB  - Springer/Plenum Publishers, New York
T2  - Journal of Polymers and the Environment
T1  - Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers
EP  - 2359
IS  - 6
SP  - 2346
VL  - 26
DO  - 10.1007/s10924-017-1130-2
ER  - 

@article{
author = "Ponjavić, Marijana and Nikolić, Marija and Jeremić, Sanja and Đokić, Lidija and Nikodinović-Runić, Jasmina and Ćosović, Vladan and Đonlagić, Jasna",
year = "2018",
abstract = "Hydrolytic, enzymatic degradation and composting under controlled conditions of series of triblock PCL/PEO copolymers, PCEC, with central short PEO block (M (n) 400 g/mol) are presented and compared with homopolymer (PCL). The PCEC copolymers, synthesized via ring-opening polymerization of epsilon-caprolactone, were characterized by H-1 NMR, quantitative C-13 NMR, GPC, DSC and WAXS. The introduction of the PEO central segment ( lt  2 wt%) in PCL chains significantly affected thermal degradation and crystallization behavior, while the hydrophobicity was slightly reduced as confirmed by water absorption and moisture uptake experiments. Hydrolytic degradation studies in phosphate buffer after 8 weeks indicated a small weight loss, while FTIR analysis detected changes in crystallinity indexes and GPC measurements revealed bulk degradation. Enzymatic degradation tested by cell-free extracts containing Pseudomonas aeruginosa PAO1 confirmed high enzyme activity throughout the surface causing morphological changes detected by optical microscopy and AFM analysis. The changes in roughness of polymer films revealed surface erosion mechanism of enzymatic degradation. Copolymer with the highest content of PEO segment and the lowest molecular weight showed better degradation ability compared to PCL and other copolymers. Furthermore, composting of polymer films in a model compost system at 37 A degrees C resulted in significant degradation of the all synthesized block copolymers.",
publisher = "Springer/Plenum Publishers, New York",
journal = "Journal of Polymers and the Environment",
title = "Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers",
pages = "2359-2346",
number = "6",
volume = "26",
doi = "10.1007/s10924-017-1130-2"
}

Ponjavić, M., Nikolić, M., Jeremić, S., Đokić, L., Nikodinović-Runić, J., Ćosović, V.,& Đonlagić, J.. (2018). Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers. in Journal of Polymers and the Environment
Springer/Plenum Publishers, New York., 26(6), 2346-2359.
https://doi.org/10.1007/s10924-017-1130-2

Ponjavić M, Nikolić M, Jeremić S, Đokić L, Nikodinović-Runić J, Ćosović V, Đonlagić J. Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers. in Journal of Polymers and the Environment. 2018;26(6):2346-2359.
doi:10.1007/s10924-017-1130-2 .

Ponjavić, Marijana, Nikolić, Marija, Jeremić, Sanja, Đokić, Lidija, Nikodinović-Runić, Jasmina, Ćosović, Vladan, Đonlagić, Jasna, "Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers" in Journal of Polymers and the Environment, 26, no. 6 (2018):2346-2359,
https://doi.org/10.1007/s10924-017-1130-2 . .

TY  - JOUR
AU  - Rusmirović, Jelena
AU  - Rančić, Milica
AU  - Pavlović, Vladimir B.
AU  - Rakić, Vesna M.
AU  - Stevanović, Sanja
AU  - Đonlagić, Jasna
AU  - Marinković, Aleksandar
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3879
AB  - Unsaturated fatty acid (FA)-modified nanocellulose (m-NC) shows potential application in improving mechanical properties of unsaturated polyester/m-NC nanocomposites (UPe/m-NC). A polyester matrix is obtained by polycondensation of maleic anhydride and products of poly(ethylene terephthalate) depolymerization with propylene glycol. Two methods of NC modification are performed: direct esterification with oleic acid, linseed, or sunflower oil FAs, and esterification/amidation with maleic acid/ethylene diamine (MA/EDA) bridging group followed by amidation with methyl ester of FAs. Increases of stress at break in the ranges from 148.8% to 181.4% and from 155.8% to193.0% for UPe/m-NC composites loaded with 1 wt% of NC modified directly or via MA/EDA cross-linker, respectively, are obtained. Results of the modeling of tensile modulus, by using the Cox-Krenchel model, show good agreement with experimentally obtained data. The effect of FAs' cross-linking capabilities on the dynamic-mechanical and thermal properties of the UPe/m-NC is studied. Cross-linking density, modulus, and T-g of the nanocomposite show appropriate relation with the unsaturation extent/structure of NC modification.
PB  - Wiley-VCH Verlag Gmbh, Weinheim
T2  - Macromolecular Materials and Engineering
T1  - Cross-Linkable Modified Nanocellulose/Polyester Resin-Based Composites: Effect of Unsaturated Fatty Acid Nanocellulose Modification on Material Performances
IS  - 8
VL  - 303
DO  - 10.1002/mame.201700648
ER  - 

@article{
author = "Rusmirović, Jelena and Rančić, Milica and Pavlović, Vladimir B. and Rakić, Vesna M. and Stevanović, Sanja and Đonlagić, Jasna and Marinković, Aleksandar",
year = "2018",
abstract = "Unsaturated fatty acid (FA)-modified nanocellulose (m-NC) shows potential application in improving mechanical properties of unsaturated polyester/m-NC nanocomposites (UPe/m-NC). A polyester matrix is obtained by polycondensation of maleic anhydride and products of poly(ethylene terephthalate) depolymerization with propylene glycol. Two methods of NC modification are performed: direct esterification with oleic acid, linseed, or sunflower oil FAs, and esterification/amidation with maleic acid/ethylene diamine (MA/EDA) bridging group followed by amidation with methyl ester of FAs. Increases of stress at break in the ranges from 148.8% to 181.4% and from 155.8% to193.0% for UPe/m-NC composites loaded with 1 wt% of NC modified directly or via MA/EDA cross-linker, respectively, are obtained. Results of the modeling of tensile modulus, by using the Cox-Krenchel model, show good agreement with experimentally obtained data. The effect of FAs' cross-linking capabilities on the dynamic-mechanical and thermal properties of the UPe/m-NC is studied. Cross-linking density, modulus, and T-g of the nanocomposite show appropriate relation with the unsaturation extent/structure of NC modification.",
publisher = "Wiley-VCH Verlag Gmbh, Weinheim",
journal = "Macromolecular Materials and Engineering",
title = "Cross-Linkable Modified Nanocellulose/Polyester Resin-Based Composites: Effect of Unsaturated Fatty Acid Nanocellulose Modification on Material Performances",
number = "8",
volume = "303",
doi = "10.1002/mame.201700648"
}

Rusmirović, J., Rančić, M., Pavlović, V. B., Rakić, V. M., Stevanović, S., Đonlagić, J.,& Marinković, A.. (2018). Cross-Linkable Modified Nanocellulose/Polyester Resin-Based Composites: Effect of Unsaturated Fatty Acid Nanocellulose Modification on Material Performances. in Macromolecular Materials and Engineering
Wiley-VCH Verlag Gmbh, Weinheim., 303(8).
https://doi.org/10.1002/mame.201700648

Rusmirović J, Rančić M, Pavlović VB, Rakić VM, Stevanović S, Đonlagić J, Marinković A. Cross-Linkable Modified Nanocellulose/Polyester Resin-Based Composites: Effect of Unsaturated Fatty Acid Nanocellulose Modification on Material Performances. in Macromolecular Materials and Engineering. 2018;303(8).
doi:10.1002/mame.201700648 .

Rusmirović, Jelena, Rančić, Milica, Pavlović, Vladimir B., Rakić, Vesna M., Stevanović, Sanja, Đonlagić, Jasna, Marinković, Aleksandar, "Cross-Linkable Modified Nanocellulose/Polyester Resin-Based Composites: Effect of Unsaturated Fatty Acid Nanocellulose Modification on Material Performances" in Macromolecular Materials and Engineering, 303, no. 8 (2018),
https://doi.org/10.1002/mame.201700648 . .

TY  - JOUR
AU  - Đonlagić, Jasna
AU  - Lancuski, Anica
AU  - Nikolić, Marija
AU  - Rogan, Jelena
AU  - Ostojić, Sanja
AU  - Petrović, Zoran
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3661
AB  - Two series of semiinterpenetrating networks (SIPN) based on linear hydrophilic poly(vinyl alcohol) (PVA) and thermoresponsive poly(N-isopropylacrylamide) (PNIPA), physically crosslinked with inorganic clay, are presented. The hydrogels with different crosslinking densities were prepared by varying the content of clay from 1 to 6 wt % and contained linear interpenetrant, PVA in the range of 0.5-1.5 wt %. The effect of clay content on swelling/deswelling behavior and phase transition in PNIPA gels, as well as the feasibility of reinforcing the gels with high molecular weight PVA, were analyzed. The thermal response of hydrogels, followed by DSC, confirmed that the insertion of hydrophilic PVA did not have a significant effect on the onset of the volume phase transition temperature, while the response was faster. The equilibrium degree of swelling of SIPNs and PNIPA hydrogels was in the range of 979 and decreased with increasing content of clay. The internal morphology and surface wettability of the hydrogels were investigated by scanning electron microscope analysis and contact angle measurements, respectively. The network structural parameters of the PNIPA and SIPN nanocomposites hydrogels, such as the average molecular weight between crosslinks, M-c, and effective crosslinking density, Ne, were determined by dynamic mechanical analysis.
PB  - Wiley-Blackwell, Hoboken
T2  - Journal of Applied Polymer Science
T1  - Hydrogels reinforced with nanoclays with improved response rate
IS  - 9
VL  - 134
DO  - 10.1002/app.44535
ER  - 

@article{
author = "Đonlagić, Jasna and Lancuski, Anica and Nikolić, Marija and Rogan, Jelena and Ostojić, Sanja and Petrović, Zoran",
year = "2017",
abstract = "Two series of semiinterpenetrating networks (SIPN) based on linear hydrophilic poly(vinyl alcohol) (PVA) and thermoresponsive poly(N-isopropylacrylamide) (PNIPA), physically crosslinked with inorganic clay, are presented. The hydrogels with different crosslinking densities were prepared by varying the content of clay from 1 to 6 wt % and contained linear interpenetrant, PVA in the range of 0.5-1.5 wt %. The effect of clay content on swelling/deswelling behavior and phase transition in PNIPA gels, as well as the feasibility of reinforcing the gels with high molecular weight PVA, were analyzed. The thermal response of hydrogels, followed by DSC, confirmed that the insertion of hydrophilic PVA did not have a significant effect on the onset of the volume phase transition temperature, while the response was faster. The equilibrium degree of swelling of SIPNs and PNIPA hydrogels was in the range of 979 and decreased with increasing content of clay. The internal morphology and surface wettability of the hydrogels were investigated by scanning electron microscope analysis and contact angle measurements, respectively. The network structural parameters of the PNIPA and SIPN nanocomposites hydrogels, such as the average molecular weight between crosslinks, M-c, and effective crosslinking density, Ne, were determined by dynamic mechanical analysis.",
publisher = "Wiley-Blackwell, Hoboken",
journal = "Journal of Applied Polymer Science",
title = "Hydrogels reinforced with nanoclays with improved response rate",
number = "9",
volume = "134",
doi = "10.1002/app.44535"
}

Đonlagić, J., Lancuski, A., Nikolić, M., Rogan, J., Ostojić, S.,& Petrović, Z.. (2017). Hydrogels reinforced with nanoclays with improved response rate. in Journal of Applied Polymer Science
Wiley-Blackwell, Hoboken., 134(9).
https://doi.org/10.1002/app.44535

Đonlagić J, Lancuski A, Nikolić M, Rogan J, Ostojić S, Petrović Z. Hydrogels reinforced with nanoclays with improved response rate. in Journal of Applied Polymer Science. 2017;134(9).
doi:10.1002/app.44535 .

Đonlagić, Jasna, Lancuski, Anica, Nikolić, Marija, Rogan, Jelena, Ostojić, Sanja, Petrović, Zoran, "Hydrogels reinforced with nanoclays with improved response rate" in Journal of Applied Polymer Science, 134, no. 9 (2017),
https://doi.org/10.1002/app.44535 . .

TY  - JOUR
AU  - Ponjavić, Marijana
AU  - Nikolić, Marija
AU  - Nikodinović-Runić, Jasmina
AU  - Jeremić, Sanja
AU  - Stevanović, Sanja
AU  - Đonlagić, Jasna
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3668
AB  - Short-term hydrolytic and enzymatic degradation of poly(epsilon-caprolactone) (PCL), one series of triblock (PCL/PEO/PCL) and the other of diblock (PCL/PEO) copolymers, with a low content of hydrophilic PEO segments is presented. The effect of the introduction of PEO as the central or lateral segment in the PCL chain on copolymer hydrolysis and biodegradation properties was investigated. FUR results revealed higher hydrolytic degradation susceptibility of diblock copolymers due to a higher hydrophilicity compared to PCL and triblock copolymers. Enzymatic degradation was tested using cell-free extracts of Pseudomonas aeruginosa PAO1, for two weeks by following the weight loss, changes in surface roughness, and changes in carbonyl and crystallinity index. The results confirmed that all samples underwent enzymatic degradation through surface erosion which was accompanied with a decrease in molecular weights. Diblock copolymers showed significantly higher weight loss and decrease in molecular weight in comparison to PCL itself and triblock copolymers. AFM analysis confirmed significant surface erosion and increase in RMS values. In addition, biodegradation of polymer films was tested in compost model system at 37 degrees C, where an effective degradation of block copolymers was observed.
PB  - Elsevier Sci Ltd, Oxford
T2  - Polymer Testing
T1  - Degradation behaviour of PCL/PEO/PCL and PCL/PEO block copolymers under controlled hydrolytic, enzymatic and composting conditions
EP  - 77
SP  - 67
VL  - 57
DO  - 10.1016/j.polymertesting.2016.11.018
ER  - 

@article{
author = "Ponjavić, Marijana and Nikolić, Marija and Nikodinović-Runić, Jasmina and Jeremić, Sanja and Stevanović, Sanja and Đonlagić, Jasna",
year = "2017",
abstract = "Short-term hydrolytic and enzymatic degradation of poly(epsilon-caprolactone) (PCL), one series of triblock (PCL/PEO/PCL) and the other of diblock (PCL/PEO) copolymers, with a low content of hydrophilic PEO segments is presented. The effect of the introduction of PEO as the central or lateral segment in the PCL chain on copolymer hydrolysis and biodegradation properties was investigated. FUR results revealed higher hydrolytic degradation susceptibility of diblock copolymers due to a higher hydrophilicity compared to PCL and triblock copolymers. Enzymatic degradation was tested using cell-free extracts of Pseudomonas aeruginosa PAO1, for two weeks by following the weight loss, changes in surface roughness, and changes in carbonyl and crystallinity index. The results confirmed that all samples underwent enzymatic degradation through surface erosion which was accompanied with a decrease in molecular weights. Diblock copolymers showed significantly higher weight loss and decrease in molecular weight in comparison to PCL itself and triblock copolymers. AFM analysis confirmed significant surface erosion and increase in RMS values. In addition, biodegradation of polymer films was tested in compost model system at 37 degrees C, where an effective degradation of block copolymers was observed.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Polymer Testing",
title = "Degradation behaviour of PCL/PEO/PCL and PCL/PEO block copolymers under controlled hydrolytic, enzymatic and composting conditions",
pages = "77-67",
volume = "57",
doi = "10.1016/j.polymertesting.2016.11.018"
}

Ponjavić, M., Nikolić, M., Nikodinović-Runić, J., Jeremić, S., Stevanović, S.,& Đonlagić, J.. (2017). Degradation behaviour of PCL/PEO/PCL and PCL/PEO block copolymers under controlled hydrolytic, enzymatic and composting conditions. in Polymer Testing
Elsevier Sci Ltd, Oxford., 57, 67-77.
https://doi.org/10.1016/j.polymertesting.2016.11.018

Ponjavić M, Nikolić M, Nikodinović-Runić J, Jeremić S, Stevanović S, Đonlagić J. Degradation behaviour of PCL/PEO/PCL and PCL/PEO block copolymers under controlled hydrolytic, enzymatic and composting conditions. in Polymer Testing. 2017;57:67-77.
doi:10.1016/j.polymertesting.2016.11.018 .

Ponjavić, Marijana, Nikolić, Marija, Nikodinović-Runić, Jasmina, Jeremić, Sanja, Stevanović, Sanja, Đonlagić, Jasna, "Degradation behaviour of PCL/PEO/PCL and PCL/PEO block copolymers under controlled hydrolytic, enzymatic and composting conditions" in Polymer Testing, 57 (2017):67-77,
https://doi.org/10.1016/j.polymertesting.2016.11.018 . .

TY  - JOUR
AU  - Nikolić, Marija
AU  - Petrović, Rada
AU  - Veljović, Đorđe
AU  - Ćosović, Vladan
AU  - Stanković, Nadežda
AU  - Đonlagić, Jasna
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3643
AB  - Poly(epsilon-caprolactone) (PCL) based nanocomposites with unmodified and organomodified sepiolites were prepared by solution casting method. The sepiolites were modified with short (3-mercaptopropyl)trimethoxysilane (SEP-SI) by using covalent grafting or with long hexadecylamine (SEP-HDA) by using ionic exchange. In order to reveal the influence of the organomodification on the nanoclay dispersion and the properties of the nano composites XRD, DSC, TG, SEM, TEM, optical microscopy, melt rheology and dynamic-mechanical analyses were performed. A better dispersion was achieved when organomodified sepiolites instead of native ones were used as fillers. As deduced from the melt rheology data, by analysis of the Cole-Cole plots, the best dispersion was obtained for SEP-SI nanoclay. The thermal stability was not improved, however in the initial stages of the thereto-oxidative degradation a delay in the weight loss was observed for nanocomposites with organomodified sepiolites. The mechanical properties of the nanocomposites were improved in comparison to PCL, particularly for those with modified sepiolites. In terms of mechanical properties the use of sepiolite modified with HDA gave the best results, as a consequence of better interaction between longer alkyl hydrophobic part of the organic modificator and the hydrophobic PCL matrix.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - European Polymer Journal
T1  - Effect of sepiolite organomodification on the performance of PCL/sepiolite nanocomposites
EP  - 209
SP  - 198
VL  - 97
DO  - 10.1016/j.eurpolymj.2017.10.010
ER  - 

@article{
author = "Nikolić, Marija and Petrović, Rada and Veljović, Đorđe and Ćosović, Vladan and Stanković, Nadežda and Đonlagić, Jasna",
year = "2017",
abstract = "Poly(epsilon-caprolactone) (PCL) based nanocomposites with unmodified and organomodified sepiolites were prepared by solution casting method. The sepiolites were modified with short (3-mercaptopropyl)trimethoxysilane (SEP-SI) by using covalent grafting or with long hexadecylamine (SEP-HDA) by using ionic exchange. In order to reveal the influence of the organomodification on the nanoclay dispersion and the properties of the nano composites XRD, DSC, TG, SEM, TEM, optical microscopy, melt rheology and dynamic-mechanical analyses were performed. A better dispersion was achieved when organomodified sepiolites instead of native ones were used as fillers. As deduced from the melt rheology data, by analysis of the Cole-Cole plots, the best dispersion was obtained for SEP-SI nanoclay. The thermal stability was not improved, however in the initial stages of the thereto-oxidative degradation a delay in the weight loss was observed for nanocomposites with organomodified sepiolites. The mechanical properties of the nanocomposites were improved in comparison to PCL, particularly for those with modified sepiolites. In terms of mechanical properties the use of sepiolite modified with HDA gave the best results, as a consequence of better interaction between longer alkyl hydrophobic part of the organic modificator and the hydrophobic PCL matrix.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "European Polymer Journal",
title = "Effect of sepiolite organomodification on the performance of PCL/sepiolite nanocomposites",
pages = "209-198",
volume = "97",
doi = "10.1016/j.eurpolymj.2017.10.010"
}

Nikolić, M., Petrović, R., Veljović, Đ., Ćosović, V., Stanković, N.,& Đonlagić, J.. (2017). Effect of sepiolite organomodification on the performance of PCL/sepiolite nanocomposites. in European Polymer Journal
Pergamon-Elsevier Science Ltd, Oxford., 97, 198-209.
https://doi.org/10.1016/j.eurpolymj.2017.10.010

Nikolić M, Petrović R, Veljović Đ, Ćosović V, Stanković N, Đonlagić J. Effect of sepiolite organomodification on the performance of PCL/sepiolite nanocomposites. in European Polymer Journal. 2017;97:198-209.
doi:10.1016/j.eurpolymj.2017.10.010 .

Nikolić, Marija, Petrović, Rada, Veljović, Đorđe, Ćosović, Vladan, Stanković, Nadežda, Đonlagić, Jasna, "Effect of sepiolite organomodification on the performance of PCL/sepiolite nanocomposites" in European Polymer Journal, 97 (2017):198-209,
https://doi.org/10.1016/j.eurpolymj.2017.10.010 . .

TY  - JOUR
AU  - Ponjavić, Marijana
AU  - Nikolić, Marija
AU  - Jevtić, Sanja
AU  - Rogan, Jelena
AU  - Stevanović, Sanja
AU  - Đonlagić, Jasna
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3419
AB  - Two series, one of triblock (PCL/PEO/PCL) and the other of diblock (PCL/PEO) copolymers were prepared by ring-opening polymerization of epsilon-caprolactone catalized with tin(II) octoate and by using dihydroxy or monohydroxy poly(ethylene oxide) as the macroinitiator. The PEO block length was fixed (M-n 1,000 g/mol) and the PCL block lengths (M-n 10,000-40,000 g/mol) were tailored by changing weight ratio of epsilon-CL/PEO. The copolymers' structure was confirmed by H-1 and quantitative C-13 NMR spectroscopy while their molecular weights were determined by GPC analysis. The thermal properties and the degree of crystallinity of the copolymers were investigated and compared by using DSC and WAXS. Both types of copolymers were semicrystalline with the orthorhombic PCL crystal lattice. The surface morphology of the copolymer films was investigated by using optical microscopy and AFM analysis, which confirmed the spherulitic lamellar structure with spherulites of different diameters. Data indicated that a low content of PEO segment had an influence on thermal degradation behavior, crystallinity and morphology of copolymers. Roughness of copolymer films was affected by the content of PEO and correlated with the spherulites' diameter. The small changes in water and moisture absorption properties of copolymers compared to homopolymer PCL were observed.
PB  - Springer, Dordrecht
T2  - Macromolecular Research
T1  - Influence of a Low Content of PEO Segment on the Thermal, Surface and Morphological Properties of Triblock and Diblock PCL Copolymers
EP  - 335
IS  - 4
SP  - 323
VL  - 24
DO  - 10.1007/s13233-016-4048-y
ER  - 

@article{
author = "Ponjavić, Marijana and Nikolić, Marija and Jevtić, Sanja and Rogan, Jelena and Stevanović, Sanja and Đonlagić, Jasna",
year = "2016",
abstract = "Two series, one of triblock (PCL/PEO/PCL) and the other of diblock (PCL/PEO) copolymers were prepared by ring-opening polymerization of epsilon-caprolactone catalized with tin(II) octoate and by using dihydroxy or monohydroxy poly(ethylene oxide) as the macroinitiator. The PEO block length was fixed (M-n 1,000 g/mol) and the PCL block lengths (M-n 10,000-40,000 g/mol) were tailored by changing weight ratio of epsilon-CL/PEO. The copolymers' structure was confirmed by H-1 and quantitative C-13 NMR spectroscopy while their molecular weights were determined by GPC analysis. The thermal properties and the degree of crystallinity of the copolymers were investigated and compared by using DSC and WAXS. Both types of copolymers were semicrystalline with the orthorhombic PCL crystal lattice. The surface morphology of the copolymer films was investigated by using optical microscopy and AFM analysis, which confirmed the spherulitic lamellar structure with spherulites of different diameters. Data indicated that a low content of PEO segment had an influence on thermal degradation behavior, crystallinity and morphology of copolymers. Roughness of copolymer films was affected by the content of PEO and correlated with the spherulites' diameter. The small changes in water and moisture absorption properties of copolymers compared to homopolymer PCL were observed.",
publisher = "Springer, Dordrecht",
journal = "Macromolecular Research",
title = "Influence of a Low Content of PEO Segment on the Thermal, Surface and Morphological Properties of Triblock and Diblock PCL Copolymers",
pages = "335-323",
number = "4",
volume = "24",
doi = "10.1007/s13233-016-4048-y"
}

Ponjavić, M., Nikolić, M., Jevtić, S., Rogan, J., Stevanović, S.,& Đonlagić, J.. (2016). Influence of a Low Content of PEO Segment on the Thermal, Surface and Morphological Properties of Triblock and Diblock PCL Copolymers. in Macromolecular Research
Springer, Dordrecht., 24(4), 323-335.
https://doi.org/10.1007/s13233-016-4048-y

Ponjavić M, Nikolić M, Jevtić S, Rogan J, Stevanović S, Đonlagić J. Influence of a Low Content of PEO Segment on the Thermal, Surface and Morphological Properties of Triblock and Diblock PCL Copolymers. in Macromolecular Research. 2016;24(4):323-335.
doi:10.1007/s13233-016-4048-y .

Ponjavić, Marijana, Nikolić, Marija, Jevtić, Sanja, Rogan, Jelena, Stevanović, Sanja, Đonlagić, Jasna, "Influence of a Low Content of PEO Segment on the Thermal, Surface and Morphological Properties of Triblock and Diblock PCL Copolymers" in Macromolecular Research, 24, no. 4 (2016):323-335,
https://doi.org/10.1007/s13233-016-4048-y . .

TY  - JOUR
AU  - Nikolić, Marija
AU  - Mitrić, Miodrag
AU  - Dapčević, Aleksandra
AU  - Đonlagić, Jasna
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3399
AB  - Viscoelastic properties in solid and in melt state of poly(epsilon-caprolactone), PCL, nanocomposites with organomodified clays (Cloisite30B and Cloisite15A) are thoroughly investigated. Although WAXD is insensitive to the difference in the nanocomposites structure, the melt rheology reveals pronounced differences between the two series. Melt yield stress values, obtained from fittings by the Carreau-Yasuda model, are used as a measure of partial exfoliation of the clay. Temperature dependence of the shift factors, used for time-temperature superposition of the modulus curves, yields similar values of the flow activation energies for all the samples. Temperature dependences of the dynamic modulus and loss factor of solid nanocomposites were correlated to the structural differences deduced from the melt rheology. The increase in the storage modulus is compared to the theoretical predictions from the Hal-pin-Tsai model. The effective aspect ratio obtained from this comparison agrees reasonably with the value estimated from the melt rheology.
PB  - Wiley, Hoboken
T2  - Journal of Applied Polymer Science
T1  - Viscoelastic properties of poly(e-caprolactone)/clay nanocomposites in solid and in melt state
IS  - 3
VL  - 133
DO  - 10.1002/app.42896
ER  - 

@article{
author = "Nikolić, Marija and Mitrić, Miodrag and Dapčević, Aleksandra and Đonlagić, Jasna",
year = "2016",
abstract = "Viscoelastic properties in solid and in melt state of poly(epsilon-caprolactone), PCL, nanocomposites with organomodified clays (Cloisite30B and Cloisite15A) are thoroughly investigated. Although WAXD is insensitive to the difference in the nanocomposites structure, the melt rheology reveals pronounced differences between the two series. Melt yield stress values, obtained from fittings by the Carreau-Yasuda model, are used as a measure of partial exfoliation of the clay. Temperature dependence of the shift factors, used for time-temperature superposition of the modulus curves, yields similar values of the flow activation energies for all the samples. Temperature dependences of the dynamic modulus and loss factor of solid nanocomposites were correlated to the structural differences deduced from the melt rheology. The increase in the storage modulus is compared to the theoretical predictions from the Hal-pin-Tsai model. The effective aspect ratio obtained from this comparison agrees reasonably with the value estimated from the melt rheology.",
publisher = "Wiley, Hoboken",
journal = "Journal of Applied Polymer Science",
title = "Viscoelastic properties of poly(e-caprolactone)/clay nanocomposites in solid and in melt state",
number = "3",
volume = "133",
doi = "10.1002/app.42896"
}

Nikolić, M., Mitrić, M., Dapčević, A.,& Đonlagić, J.. (2016). Viscoelastic properties of poly(e-caprolactone)/clay nanocomposites in solid and in melt state. in Journal of Applied Polymer Science
Wiley, Hoboken., 133(3).
https://doi.org/10.1002/app.42896

Nikolić M, Mitrić M, Dapčević A, Đonlagić J. Viscoelastic properties of poly(e-caprolactone)/clay nanocomposites in solid and in melt state. in Journal of Applied Polymer Science. 2016;133(3).
doi:10.1002/app.42896 .

Nikolić, Marija, Mitrić, Miodrag, Dapčević, Aleksandra, Đonlagić, Jasna, "Viscoelastic properties of poly(e-caprolactone)/clay nanocomposites in solid and in melt state" in Journal of Applied Polymer Science, 133, no. 3 (2016),
https://doi.org/10.1002/app.42896 . .

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  - 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  - Nikolić, Marija
AU  - Đorđević, Nataša
AU  - Rogan, Jelena
AU  - Đonlagić, Jasna
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2988
AB  - Two series of poly(epsilon-caprolactone) poly(oxepan-2-one) nanocomposites with different organo-modified clays (1 to 8 wt. %) were prepared by the solution casting method. Organoclays with polar (Cloisite (R) C30B) and nonpolar (Cloisite (R) C 15A) organic modifiers and with different miscibility with the poly(epsilon-caprolactone) matrix were chosen. Exfoliated and/or intercalated structures of the nanocomposite were obtained using high dilution and ultrasonic treatment for the preparation of the composite. The effects of the surface modification and clay content on the morphology, and mechanical and thermal properties of the nanocomposites were studied. Scanning electron microscopy excluded the formation of microcomposites. The wide-angle X-ray diffraction analysis revealed that the tendency toward exfoliated structures was higher with Cloisite (R) C30B, which had better miscibility with poly(epsilon-caprolactone) matrix, than with Cloisite (R) Cl 5A. Differences in the sizes of the spherulites and morphology between two series of the nanocomposites were observed by optical microscopy performed on as-cast films. The enthalpies of fusion and degrees of crystallinity were higher for the nanocomposites than for the neat poly(epsilon-caprolactone) and increased with clay loading in both series, because of the nucleating effect of the clay. The decreased thermal stability of the nanocomposites was ascribed to the thermal instability of the organic modifiers of the clays. The Halpin-Tsai model was used to compare the theoretically predicted values of the Young's modulus with the ones experimentally obtained in tensile tests.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Influence of clay organic modifier on the morphology and performance of poly(epsilon-caprolactone)/clay nanocomposites
EP  - 547
IS  - 4
SP  - 529
VL  - 80
DO  - 10.2298/JSC140924119N
ER  - 

@article{
author = "Nikolić, Marija and Đorđević, Nataša and Rogan, Jelena and Đonlagić, Jasna",
year = "2015",
abstract = "Two series of poly(epsilon-caprolactone) poly(oxepan-2-one) nanocomposites with different organo-modified clays (1 to 8 wt. %) were prepared by the solution casting method. Organoclays with polar (Cloisite (R) C30B) and nonpolar (Cloisite (R) C 15A) organic modifiers and with different miscibility with the poly(epsilon-caprolactone) matrix were chosen. Exfoliated and/or intercalated structures of the nanocomposite were obtained using high dilution and ultrasonic treatment for the preparation of the composite. The effects of the surface modification and clay content on the morphology, and mechanical and thermal properties of the nanocomposites were studied. Scanning electron microscopy excluded the formation of microcomposites. The wide-angle X-ray diffraction analysis revealed that the tendency toward exfoliated structures was higher with Cloisite (R) C30B, which had better miscibility with poly(epsilon-caprolactone) matrix, than with Cloisite (R) Cl 5A. Differences in the sizes of the spherulites and morphology between two series of the nanocomposites were observed by optical microscopy performed on as-cast films. The enthalpies of fusion and degrees of crystallinity were higher for the nanocomposites than for the neat poly(epsilon-caprolactone) and increased with clay loading in both series, because of the nucleating effect of the clay. The decreased thermal stability of the nanocomposites was ascribed to the thermal instability of the organic modifiers of the clays. The Halpin-Tsai model was used to compare the theoretically predicted values of the Young's modulus with the ones experimentally obtained in tensile tests.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Influence of clay organic modifier on the morphology and performance of poly(epsilon-caprolactone)/clay nanocomposites",
pages = "547-529",
number = "4",
volume = "80",
doi = "10.2298/JSC140924119N"
}

Nikolić, M., Đorđević, N., Rogan, J.,& Đonlagić, J.. (2015). Influence of clay organic modifier on the morphology and performance of poly(epsilon-caprolactone)/clay nanocomposites. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 80(4), 529-547.
https://doi.org/10.2298/JSC140924119N

Nikolić M, Đorđević N, Rogan J, Đonlagić J. Influence of clay organic modifier on the morphology and performance of poly(epsilon-caprolactone)/clay nanocomposites. in Journal of the Serbian Chemical Society. 2015;80(4):529-547.
doi:10.2298/JSC140924119N .

Nikolić, Marija, Đorđević, Nataša, Rogan, Jelena, Đonlagić, Jasna, "Influence of clay organic modifier on the morphology and performance of poly(epsilon-caprolactone)/clay nanocomposites" in Journal of the Serbian Chemical Society, 80, no. 4 (2015):529-547,
https://doi.org/10.2298/JSC140924119N . .

TY  - JOUR
AU  - Pergal, Marija
AU  - Stefanović, Ivan
AU  - Gođevac, Dejan
AU  - Antić, Vesna
AU  - Milačić, Vesna
AU  - Ostojić, Sanja
AU  - Rogan, Jelena
AU  - Đonlagić, Jasna
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2692
AB  - In this study, the synthesis, structure and physical properties of two series of thermoplastic polyurethanes based on hydroxypropyl-terminated poly(dimethylsiloxane) (HP-PDMS) or hydroxyethoxypropyl-terminated poly(dimethylsiloxane) (EO-PDMS) as soft segments, and 4,4'-methylenediphenyl diisocyanate and 1,4-butanediol as hard segments were investigated. The polyurethanes were synthesized by two-step polyaddition in solution. The effects of the type and content of PDMS segments on the structure, thermal and surface properties of copolymers were studied by H-1-, C-13-nuclear magnetic resonance (NMR) spectroscopy and two-dimensional NMR spectroscopies (heteronuclear multiple bond correlation (HMBC) and rotating-frame nuclear Overhauser effect (ROESY)), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), wide-angle X-ray scattering (WAXS), scanning electron microscopy (SEM) and water contact angle and water absorption measurements. Thermal properties investigated by DSC indicated that the presence of soft PDMS segments lowers the glass transition and melting temperatures of the hard phase as well as the degree of crystallinity. SEM analysis of the copolymers with a lower soft segment content confirmed the presence of spherulite superstructures, which arise from the crystallization of the hard segments. When compared with polyurethanes prepared from HP-PDMS, the copolymers synthesized from EO-PDMS with the same content of the soft segments had a higher degree of crystallinity, better thermal stability and a less hydrophobic surface. The obtained results showed that the synthesized polyurethanes had good thermal and surface properties, which could be further modified by changing the type or content of the soft segments.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Structural, thermal and surface characterization of thermoplastic polyurethanes based on poly(dimethylsiloxane)
EP  - +
IS  - 7
SP  - 843
VL  - 79
DO  - 10.2298/JSC130819149P
ER  - 

@article{
author = "Pergal, Marija and Stefanović, Ivan and Gođevac, Dejan and Antić, Vesna and Milačić, Vesna and Ostojić, Sanja and Rogan, Jelena and Đonlagić, Jasna",
year = "2014",
abstract = "In this study, the synthesis, structure and physical properties of two series of thermoplastic polyurethanes based on hydroxypropyl-terminated poly(dimethylsiloxane) (HP-PDMS) or hydroxyethoxypropyl-terminated poly(dimethylsiloxane) (EO-PDMS) as soft segments, and 4,4'-methylenediphenyl diisocyanate and 1,4-butanediol as hard segments were investigated. The polyurethanes were synthesized by two-step polyaddition in solution. The effects of the type and content of PDMS segments on the structure, thermal and surface properties of copolymers were studied by H-1-, C-13-nuclear magnetic resonance (NMR) spectroscopy and two-dimensional NMR spectroscopies (heteronuclear multiple bond correlation (HMBC) and rotating-frame nuclear Overhauser effect (ROESY)), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), wide-angle X-ray scattering (WAXS), scanning electron microscopy (SEM) and water contact angle and water absorption measurements. Thermal properties investigated by DSC indicated that the presence of soft PDMS segments lowers the glass transition and melting temperatures of the hard phase as well as the degree of crystallinity. SEM analysis of the copolymers with a lower soft segment content confirmed the presence of spherulite superstructures, which arise from the crystallization of the hard segments. When compared with polyurethanes prepared from HP-PDMS, the copolymers synthesized from EO-PDMS with the same content of the soft segments had a higher degree of crystallinity, better thermal stability and a less hydrophobic surface. The obtained results showed that the synthesized polyurethanes had good thermal and surface properties, which could be further modified by changing the type or content of the soft segments.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Structural, thermal and surface characterization of thermoplastic polyurethanes based on poly(dimethylsiloxane)",
pages = "+-843",
number = "7",
volume = "79",
doi = "10.2298/JSC130819149P"
}

Pergal, M., Stefanović, I., Gođevac, D., Antić, V., Milačić, V., Ostojić, S., Rogan, J.,& Đonlagić, J.. (2014). Structural, thermal and surface characterization of thermoplastic polyurethanes based on poly(dimethylsiloxane). in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 79(7), 843-+.
https://doi.org/10.2298/JSC130819149P

Pergal M, Stefanović I, Gođevac D, Antić V, Milačić V, Ostojić S, Rogan J, Đonlagić J. Structural, thermal and surface characterization of thermoplastic polyurethanes based on poly(dimethylsiloxane). in Journal of the Serbian Chemical Society. 2014;79(7):843-+.
doi:10.2298/JSC130819149P .

Pergal, Marija, Stefanović, Ivan, Gođevac, Dejan, Antić, Vesna, Milačić, Vesna, Ostojić, Sanja, Rogan, Jelena, Đonlagić, Jasna, "Structural, thermal and surface characterization of thermoplastic polyurethanes based on poly(dimethylsiloxane)" in Journal of the Serbian Chemical Society, 79, no. 7 (2014):843-+,
https://doi.org/10.2298/JSC130819149P . .

TY  - JOUR
AU  - Dikić, Jelena
AU  - Hrenović, Jasna
AU  - Goić-Barisić, Ivana
AU  - Tomić, Miloš
AU  - Đonlagić, Jasna
AU  - Rajić, Nevenka
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2742
AB  - Due to their susceptibility to bacterial biofilm formation, commercial tubes for medical use are one of the main sources of hospital infections with Acinetobacter baumannii. The anti-biofouling activity of novel composites against the clinical isolate of the multi-drug resistant A. baumannii is reported here. The composites were prepared by addition of micronised silver-exchanged natural zeolite (Ag-NZ) into poly(vinyl chloride) (PVC), followed by coating of the composites with D-Tyrosine (D-Tyr). The Ag-NZ composites (containing 1-15 wt% of Ag-NZ) coated with D-Tyr (Ag-NZ-Tyr) showed a bactericidal effect (100% or a 6.9 log CFU reduction) towards immobilised bacterial cells. The uncoated Ag-NZ composites showed a reduction of up to 70% (4.4 log CFU) of immobilised bacteria in comparison with the original PVC. Rheological testing of the composites revealed that the addition of Ag-NZ slightly affected processability and formability of the PVC and increased the elasticity of the polymer matrix.
PB  - Taylor & Francis Ltd, Abingdon
T2  - Biofouling
T1  - Synergistic anti-biofouling effect of Ag-exchanged zeolite and D-Tyrosine on PVC composite against the clinical isolate of Acinetobacter baumannii
EP  - 973
IS  - 8
SP  - 965
VL  - 30
DO  - 10.1080/08927014.2014.959941
ER  - 

@article{
author = "Dikić, Jelena and Hrenović, Jasna and Goić-Barisić, Ivana and Tomić, Miloš and Đonlagić, Jasna and Rajić, Nevenka",
year = "2014",
abstract = "Due to their susceptibility to bacterial biofilm formation, commercial tubes for medical use are one of the main sources of hospital infections with Acinetobacter baumannii. The anti-biofouling activity of novel composites against the clinical isolate of the multi-drug resistant A. baumannii is reported here. The composites were prepared by addition of micronised silver-exchanged natural zeolite (Ag-NZ) into poly(vinyl chloride) (PVC), followed by coating of the composites with D-Tyrosine (D-Tyr). The Ag-NZ composites (containing 1-15 wt% of Ag-NZ) coated with D-Tyr (Ag-NZ-Tyr) showed a bactericidal effect (100% or a 6.9 log CFU reduction) towards immobilised bacterial cells. The uncoated Ag-NZ composites showed a reduction of up to 70% (4.4 log CFU) of immobilised bacteria in comparison with the original PVC. Rheological testing of the composites revealed that the addition of Ag-NZ slightly affected processability and formability of the PVC and increased the elasticity of the polymer matrix.",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "Biofouling",
title = "Synergistic anti-biofouling effect of Ag-exchanged zeolite and D-Tyrosine on PVC composite against the clinical isolate of Acinetobacter baumannii",
pages = "973-965",
number = "8",
volume = "30",
doi = "10.1080/08927014.2014.959941"
}

Dikić, J., Hrenović, J., Goić-Barisić, I., Tomić, M., Đonlagić, J.,& Rajić, N.. (2014). Synergistic anti-biofouling effect of Ag-exchanged zeolite and D-Tyrosine on PVC composite against the clinical isolate of Acinetobacter baumannii. in Biofouling
Taylor & Francis Ltd, Abingdon., 30(8), 965-973.
https://doi.org/10.1080/08927014.2014.959941

Dikić J, Hrenović J, Goić-Barisić I, Tomić M, Đonlagić J, Rajić N. Synergistic anti-biofouling effect of Ag-exchanged zeolite and D-Tyrosine on PVC composite against the clinical isolate of Acinetobacter baumannii. in Biofouling. 2014;30(8):965-973.
doi:10.1080/08927014.2014.959941 .

Dikić, Jelena, Hrenović, Jasna, Goić-Barisić, Ivana, Tomić, Miloš, Đonlagić, Jasna, Rajić, Nevenka, "Synergistic anti-biofouling effect of Ag-exchanged zeolite and D-Tyrosine on PVC composite against the clinical isolate of Acinetobacter baumannii" in Biofouling, 30, no. 8 (2014):965-973,
https://doi.org/10.1080/08927014.2014.959941 . .

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  - Pepić, Dragana
AU  - Nikolić, Marija
AU  - Grujić, Svetlana
AU  - Laušević, Mila
AU  - Đonlagić, Jasna
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2475
AB  - Poly(epsilon-caprolactone) (PCL), a biodegradable and biocompatible aliphatic polyester has a great potential as a drug carrying material in controlled drug delivery/release systems. The most simple and economical way to tailor the release profile of active substances from biodegradable polymer matrix is by the addition of the second polymeric component in the polymer matrix, i.e. by blending. This study describes the preparation and characterization of a carbamazepine-loaded microspheres by the use of PCL blended with poly(ethylene oxide) as a drug carrying material. By the use of two-component hydrophilic/hydrophobic polymer blend as a microspheres' matrix material, release profile of the drug can be modified and dictated. The microspheres prepared by classical oil-in-water emulsion solvent evaporation technique were characterized with respect to particle size and morphology, polymer matrix composition, encapsulation efficiency, physical state of the drug and in vitro release behaviour. It was presented that the release profile can be modified by the presence and the amount of hydrophilic component in the starting formulation of microspheres.
PB  - Informa Healthcare, London
T2  - Journal of Microencapsulation
T1  - Release behaviour of carbamazepine-loaded poly(epsilon-caprolactone)/poly(ethylene oxide) microspheres
EP  - 160
IS  - 2
SP  - 151
VL  - 30
DO  - 10.3109/02652048.2012.704954
ER  - 

@article{
author = "Pepić, Dragana and Nikolić, Marija and Grujić, Svetlana and Laušević, Mila and Đonlagić, Jasna",
year = "2013",
abstract = "Poly(epsilon-caprolactone) (PCL), a biodegradable and biocompatible aliphatic polyester has a great potential as a drug carrying material in controlled drug delivery/release systems. The most simple and economical way to tailor the release profile of active substances from biodegradable polymer matrix is by the addition of the second polymeric component in the polymer matrix, i.e. by blending. This study describes the preparation and characterization of a carbamazepine-loaded microspheres by the use of PCL blended with poly(ethylene oxide) as a drug carrying material. By the use of two-component hydrophilic/hydrophobic polymer blend as a microspheres' matrix material, release profile of the drug can be modified and dictated. The microspheres prepared by classical oil-in-water emulsion solvent evaporation technique were characterized with respect to particle size and morphology, polymer matrix composition, encapsulation efficiency, physical state of the drug and in vitro release behaviour. It was presented that the release profile can be modified by the presence and the amount of hydrophilic component in the starting formulation of microspheres.",
publisher = "Informa Healthcare, London",
journal = "Journal of Microencapsulation",
title = "Release behaviour of carbamazepine-loaded poly(epsilon-caprolactone)/poly(ethylene oxide) microspheres",
pages = "160-151",
number = "2",
volume = "30",
doi = "10.3109/02652048.2012.704954"
}

Pepić, D., Nikolić, M., Grujić, S., Laušević, M.,& Đonlagić, J.. (2013). Release behaviour of carbamazepine-loaded poly(epsilon-caprolactone)/poly(ethylene oxide) microspheres. in Journal of Microencapsulation
Informa Healthcare, London., 30(2), 151-160.
https://doi.org/10.3109/02652048.2012.704954

Pepić D, Nikolić M, Grujić S, Laušević M, Đonlagić J. Release behaviour of carbamazepine-loaded poly(epsilon-caprolactone)/poly(ethylene oxide) microspheres. in Journal of Microencapsulation. 2013;30(2):151-160.
doi:10.3109/02652048.2012.704954 .

Pepić, Dragana, Nikolić, Marija, Grujić, Svetlana, Laušević, Mila, Đonlagić, Jasna, "Release behaviour of carbamazepine-loaded poly(epsilon-caprolactone)/poly(ethylene oxide) microspheres" in Journal of Microencapsulation, 30, no. 2 (2013):151-160,
https://doi.org/10.3109/02652048.2012.704954 . .

TY  - JOUR
AU  - Balaban, Milica
AU  - Antić, Vesna
AU  - Pergal, Marija
AU  - Gođevac, Dejan
AU  - Francolini, Iolanda
AU  - Martinelli, Andrea
AU  - Rogan, Jelena
AU  - Đonlagić, Jasna
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2500
AB  - Segmented poly(urethane-urea-siloxane)s (PUUS) were synthesized using 4,4'-methylenediphenyl diisocyanate (MDI) and ethylene diamine (ED) as the hard segment components and hydroxypropyl-terminated poly(dimethylsiloxane) (PDMS) as the soft segment component, where the hard segment content ranged from 38 to 65 wt%. Segmented PUUSs were prepared by a two-step polymerization procedure in tetrahydrofuran/N-methylpyrrolidone (THF/NMP) mixture with a large proportion of polar solvent. The structure, composition and hard segment length were determined by C-13 NMR and two-dimensional correlation spectroscopy. Thermal, mechanical, small-angle X-ray scattering and hydrogen bonding analyses indicated the formation of the microphase-separated copolymers with high tensile strength. Globular superstructures observed in the copolymer films by scanning electron microscopy (SEM) and atomic force microscopy (AFM) were probably arisen from the microstructural organization of the MDI-ED segments, depending on their content and length. The PUUS copolymers showed high water resistance and became more hydrophobic with increasing weight fraction of PDMS.
PB  - Springer, New York
T2  - Polymer Bulletin
T1  - Influence of the chemical structure of poly(urea-urethane-siloxane)s on their morphological, surface and thermal properties
EP  - 2518
IS  - 9
SP  - 2493
VL  - 70
DO  - 10.1007/s00289-013-0968-2
ER  - 

@article{
author = "Balaban, Milica and Antić, Vesna and Pergal, Marija and Gođevac, Dejan and Francolini, Iolanda and Martinelli, Andrea and Rogan, Jelena and Đonlagić, Jasna",
year = "2013",
abstract = "Segmented poly(urethane-urea-siloxane)s (PUUS) were synthesized using 4,4'-methylenediphenyl diisocyanate (MDI) and ethylene diamine (ED) as the hard segment components and hydroxypropyl-terminated poly(dimethylsiloxane) (PDMS) as the soft segment component, where the hard segment content ranged from 38 to 65 wt%. Segmented PUUSs were prepared by a two-step polymerization procedure in tetrahydrofuran/N-methylpyrrolidone (THF/NMP) mixture with a large proportion of polar solvent. The structure, composition and hard segment length were determined by C-13 NMR and two-dimensional correlation spectroscopy. Thermal, mechanical, small-angle X-ray scattering and hydrogen bonding analyses indicated the formation of the microphase-separated copolymers with high tensile strength. Globular superstructures observed in the copolymer films by scanning electron microscopy (SEM) and atomic force microscopy (AFM) were probably arisen from the microstructural organization of the MDI-ED segments, depending on their content and length. The PUUS copolymers showed high water resistance and became more hydrophobic with increasing weight fraction of PDMS.",
publisher = "Springer, New York",
journal = "Polymer Bulletin",
title = "Influence of the chemical structure of poly(urea-urethane-siloxane)s on their morphological, surface and thermal properties",
pages = "2518-2493",
number = "9",
volume = "70",
doi = "10.1007/s00289-013-0968-2"
}

Balaban, M., Antić, V., Pergal, M., Gođevac, D., Francolini, I., Martinelli, A., Rogan, J.,& Đonlagić, J.. (2013). Influence of the chemical structure of poly(urea-urethane-siloxane)s on their morphological, surface and thermal properties. in Polymer Bulletin
Springer, New York., 70(9), 2493-2518.
https://doi.org/10.1007/s00289-013-0968-2

Balaban M, Antić V, Pergal M, Gođevac D, Francolini I, Martinelli A, Rogan J, Đonlagić J. Influence of the chemical structure of poly(urea-urethane-siloxane)s on their morphological, surface and thermal properties. in Polymer Bulletin. 2013;70(9):2493-2518.
doi:10.1007/s00289-013-0968-2 .

Balaban, Milica, Antić, Vesna, Pergal, Marija, Gođevac, Dejan, Francolini, Iolanda, Martinelli, Andrea, Rogan, Jelena, Đonlagić, Jasna, "Influence of the chemical structure of poly(urea-urethane-siloxane)s on their morphological, surface and thermal properties" in Polymer Bulletin, 70, no. 9 (2013):2493-2518,
https://doi.org/10.1007/s00289-013-0968-2 . .

TY  - JOUR
AU  - Petrusić, Stojanka
AU  - Jovančić, Petar
AU  - Lewandowski, Maryline
AU  - Giraud, Stephane
AU  - Bugarski, Branko
AU  - Đonlagić, Jasna
AU  - Koncar, Vladan
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2178
AB  - This study was aimed at optimizing the structure and properties of poly(N-isopropylacrylamide) (PNIPAAm) microgels prepared by inverse suspension polymerization. The influence of the oil-to-water phase ratio, the concentration of emulsifier, and the monomer-to-crosslinker molar ratio on selected properties of the PNIPAAm microgels was examined. Regularity of the microgels shape was estimated by optical microscopy. Laser diffraction technique was used to determine the microgels mean size and size distribution. Equilibrium swelling ratio was studied gravimetrically. Morphology of microgels was followed by SEM. Volume phase transition temperature of PNIPAAm microgels was determined by differential scanning calorimetry. The results obtained imply that the mean diameter of microgels and their equilibrium swelling ratio highly depend on the concentration of emulsifier in oil phase and the crosslinking degree of PNIPAAm. The crosslinking degree of PNIPAAm has no substantial effect on the volume phase transition temperature that is demonstrated to be around 33 degrees C even after complete heating-cooling-heating cycle. In addition, it was confirmed that the swollen microgels have a porous, honeycomb-like structure. Release profiles of procaine hydrochloride from the PNIPAAm microgels confirmed their potential to be considered as efficient matrices in drug release applications.
PB  - Springer, Dordrecht
T2  - Journal of Polymer Research
T1  - Synthesis, characterization and drug release properties of thermosensitive poly(N-isopropylacrylamide) microgels
IS  - 10
VL  - 19
DO  - 10.1007/s10965-012-9979-1
ER  - 

@article{
author = "Petrusić, Stojanka and Jovančić, Petar and Lewandowski, Maryline and Giraud, Stephane and Bugarski, Branko and Đonlagić, Jasna and Koncar, Vladan",
year = "2012",
abstract = "This study was aimed at optimizing the structure and properties of poly(N-isopropylacrylamide) (PNIPAAm) microgels prepared by inverse suspension polymerization. The influence of the oil-to-water phase ratio, the concentration of emulsifier, and the monomer-to-crosslinker molar ratio on selected properties of the PNIPAAm microgels was examined. Regularity of the microgels shape was estimated by optical microscopy. Laser diffraction technique was used to determine the microgels mean size and size distribution. Equilibrium swelling ratio was studied gravimetrically. Morphology of microgels was followed by SEM. Volume phase transition temperature of PNIPAAm microgels was determined by differential scanning calorimetry. The results obtained imply that the mean diameter of microgels and their equilibrium swelling ratio highly depend on the concentration of emulsifier in oil phase and the crosslinking degree of PNIPAAm. The crosslinking degree of PNIPAAm has no substantial effect on the volume phase transition temperature that is demonstrated to be around 33 degrees C even after complete heating-cooling-heating cycle. In addition, it was confirmed that the swollen microgels have a porous, honeycomb-like structure. Release profiles of procaine hydrochloride from the PNIPAAm microgels confirmed their potential to be considered as efficient matrices in drug release applications.",
publisher = "Springer, Dordrecht",
journal = "Journal of Polymer Research",
title = "Synthesis, characterization and drug release properties of thermosensitive poly(N-isopropylacrylamide) microgels",
number = "10",
volume = "19",
doi = "10.1007/s10965-012-9979-1"
}

Petrusić, S., Jovančić, P., Lewandowski, M., Giraud, S., Bugarski, B., Đonlagić, J.,& Koncar, V.. (2012). Synthesis, characterization and drug release properties of thermosensitive poly(N-isopropylacrylamide) microgels. in Journal of Polymer Research
Springer, Dordrecht., 19(10).
https://doi.org/10.1007/s10965-012-9979-1

Petrusić S, Jovančić P, Lewandowski M, Giraud S, Bugarski B, Đonlagić J, Koncar V. Synthesis, characterization and drug release properties of thermosensitive poly(N-isopropylacrylamide) microgels. in Journal of Polymer Research. 2012;19(10).
doi:10.1007/s10965-012-9979-1 .

Petrusić, Stojanka, Jovančić, Petar, Lewandowski, Maryline, Giraud, Stephane, Bugarski, Branko, Đonlagić, Jasna, Koncar, Vladan, "Synthesis, characterization and drug release properties of thermosensitive poly(N-isopropylacrylamide) microgels" in Journal of Polymer Research, 19, no. 10 (2012),
https://doi.org/10.1007/s10965-012-9979-1 . .

TY  - JOUR
AU  - Đonlagić, Jasna
AU  - Nikolić, Marija
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1772
T2  - RSC Green Chemistry
T1  - Biodegradable polyesters: Synthesis and physical properties
EP  - 196
SP  - 149
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1772
ER  - 

@article{
author = "Đonlagić, Jasna and Nikolić, Marija",
year = "2011",
journal = "RSC Green Chemistry",
title = "Biodegradable polyesters: Synthesis and physical properties",
pages = "196-149",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1772"
}

Đonlagić, J.,& Nikolić, M.. (2011). Biodegradable polyesters: Synthesis and physical properties. in RSC Green Chemistry, 149-196.
https://hdl.handle.net/21.15107/rcub_technorep_1772

Đonlagić J, Nikolić M. Biodegradable polyesters: Synthesis and physical properties. in RSC Green Chemistry. 2011;:149-196.
https://hdl.handle.net/21.15107/rcub_technorep_1772 .

Đonlagić, Jasna, Nikolić, Marija, "Biodegradable polyesters: Synthesis and physical properties" in RSC Green Chemistry (2011):149-196,
https://hdl.handle.net/21.15107/rcub_technorep_1772 .

TY  - CHAP
AU  - Đonlagić, Jasna
AU  - Nikolić, Marija
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1770
AB  - In this chapter the preparation, structure and properties of thermoplastic copolyester elastomers, TPEE, are presented. TPEEs are multiblock copolymers built up from so-called short crystallizable hard segments and long flexible segments. Owing to such chemical structure, TPEEs exhibit unusual combination of thermoplastic and elastomeric behavior. Physical and mechanical properties of these copolymers strongly depend on the chemical composition and the molecular structure of both hard and soft segments. By variation of the hard to soft segment ratio, the length of the soft segments and the degree of crystallinity of the hard segments, TPEEs ranging from soft to the relatively hard elastomers could be obtained. Recent developments in design and application of high-performance engineering TPEE materials and their blends and nanocomposites, as well as biodegradable TPEEs, are presented. Environmental impact, recycling possibilities and the future trends in TPEEs development are also addressed.
T2  - Handbook of Engineering and Speciality Thermoplastics: Polyethers and Polyesters
T1  - Thermoplastic Copolyester Elastomers
EP  - 427
SP  - 377
VL  - 3
DO  - 10.1002/9781118104729.ch10
ER  - 

@inbook{
author = "Đonlagić, Jasna and Nikolić, Marija",
year = "2011",
abstract = "In this chapter the preparation, structure and properties of thermoplastic copolyester elastomers, TPEE, are presented. TPEEs are multiblock copolymers built up from so-called short crystallizable hard segments and long flexible segments. Owing to such chemical structure, TPEEs exhibit unusual combination of thermoplastic and elastomeric behavior. Physical and mechanical properties of these copolymers strongly depend on the chemical composition and the molecular structure of both hard and soft segments. By variation of the hard to soft segment ratio, the length of the soft segments and the degree of crystallinity of the hard segments, TPEEs ranging from soft to the relatively hard elastomers could be obtained. Recent developments in design and application of high-performance engineering TPEE materials and their blends and nanocomposites, as well as biodegradable TPEEs, are presented. Environmental impact, recycling possibilities and the future trends in TPEEs development are also addressed.",
journal = "Handbook of Engineering and Speciality Thermoplastics: Polyethers and Polyesters",
booktitle = "Thermoplastic Copolyester Elastomers",
pages = "427-377",
volume = "3",
doi = "10.1002/9781118104729.ch10"
}

Đonlagić, J.,& Nikolić, M.. (2011). Thermoplastic Copolyester Elastomers. in Handbook of Engineering and Speciality Thermoplastics: Polyethers and Polyesters, 3, 377-427.
https://doi.org/10.1002/9781118104729.ch10

Đonlagić J, Nikolić M. Thermoplastic Copolyester Elastomers. in Handbook of Engineering and Speciality Thermoplastics: Polyethers and Polyesters. 2011;3:377-427.
doi:10.1002/9781118104729.ch10 .

Đonlagić, Jasna, Nikolić, Marija, "Thermoplastic Copolyester Elastomers" in Handbook of Engineering and Speciality Thermoplastics: Polyethers and Polyesters, 3 (2011):377-427,
https://doi.org/10.1002/9781118104729.ch10 . .