TY  - JOUR
AU  - Nastasović, Aleksandra
AU  - Onjia, Antonije
AU  - Milonjić, Slobodan K.
AU  - Jovanović, SM
PY  - 2005
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/848
AB  - Macroporous crosslinked poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate) (PGME) was synthesized by suspension copolymerization and modified by ring-opening reaction of the pendant epoxy groups with ethylene diamine (EDA). Inverse gas chromatography (IGC) at infinite dilution was applied to determine the thermodynamic interactions of PGME and modified copolymer, PGME-en. The specific surface areas of the initial and modified copolymer samples were determined by the BET method, from low-temperature nitrogen adsorption isotherms. The specific retention volumes, Vg, of 10 organic compounds of different chemical nature and polarity (nonpolar, donor, or acceptor) were determined in the temperature range 333-413 K. The weight fraction activity coefficients of test sorbates, ohm(infinity)(1), and Flory-Huggins interaction parameters, chi(infinity)(12), were calculated and discussed in terms of interactions of sorbates with PGME and PGME-en. Also, the partial molar free energy, Delta G(1)(S), partial molar heat of mixing, Delta H-1(infinity), sorption molar free energy, Delta G(1)(S), sorption enthalpy Delta H-1(S), and sorption entropy, Delta S-S(1), were calculated. Glass transitions in PGME and PGME-en, determined from IGC data, were observed in the temperature range 373-393 K and 363-373 K, respectively.
PB  - Wiley, Hoboken
T2  - Journal of Polymer Science Part B-Polymer Physics
T1  - Determination of thermodynamic properties of macroporous glycidyl methacrylate-based copolymers by inverse gas chromatography
EP  - 2533
IS  - 18
SP  - 2524
VL  - 43
DO  - 10.1002/polb.20538
ER  - 

@article{
author = "Nastasović, Aleksandra and Onjia, Antonije and Milonjić, Slobodan K. and Jovanović, SM",
year = "2005",
abstract = "Macroporous crosslinked poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate) (PGME) was synthesized by suspension copolymerization and modified by ring-opening reaction of the pendant epoxy groups with ethylene diamine (EDA). Inverse gas chromatography (IGC) at infinite dilution was applied to determine the thermodynamic interactions of PGME and modified copolymer, PGME-en. The specific surface areas of the initial and modified copolymer samples were determined by the BET method, from low-temperature nitrogen adsorption isotherms. The specific retention volumes, Vg, of 10 organic compounds of different chemical nature and polarity (nonpolar, donor, or acceptor) were determined in the temperature range 333-413 K. The weight fraction activity coefficients of test sorbates, ohm(infinity)(1), and Flory-Huggins interaction parameters, chi(infinity)(12), were calculated and discussed in terms of interactions of sorbates with PGME and PGME-en. Also, the partial molar free energy, Delta G(1)(S), partial molar heat of mixing, Delta H-1(infinity), sorption molar free energy, Delta G(1)(S), sorption enthalpy Delta H-1(S), and sorption entropy, Delta S-S(1), were calculated. Glass transitions in PGME and PGME-en, determined from IGC data, were observed in the temperature range 373-393 K and 363-373 K, respectively.",
publisher = "Wiley, Hoboken",
journal = "Journal of Polymer Science Part B-Polymer Physics",
title = "Determination of thermodynamic properties of macroporous glycidyl methacrylate-based copolymers by inverse gas chromatography",
pages = "2533-2524",
number = "18",
volume = "43",
doi = "10.1002/polb.20538"
}

Nastasović, A., Onjia, A., Milonjić, S. K.,& Jovanović, S.. (2005). Determination of thermodynamic properties of macroporous glycidyl methacrylate-based copolymers by inverse gas chromatography. in Journal of Polymer Science Part B-Polymer Physics
Wiley, Hoboken., 43(18), 2524-2533.
https://doi.org/10.1002/polb.20538

Nastasović A, Onjia A, Milonjić SK, Jovanović S. Determination of thermodynamic properties of macroporous glycidyl methacrylate-based copolymers by inverse gas chromatography. in Journal of Polymer Science Part B-Polymer Physics. 2005;43(18):2524-2533.
doi:10.1002/polb.20538 .

Nastasović, Aleksandra, Onjia, Antonije, Milonjić, Slobodan K., Jovanović, SM, "Determination of thermodynamic properties of macroporous glycidyl methacrylate-based copolymers by inverse gas chromatography" in Journal of Polymer Science Part B-Polymer Physics, 43, no. 18 (2005):2524-2533,
https://doi.org/10.1002/polb.20538 . .

TY  - JOUR
AU  - Nastasović, Aleksandra
AU  - Onjia, Antonije
AU  - Milonjić, Slobodan K.
AU  - Vuković, Zorica M.
AU  - Jovanović, SM
PY  - 2005
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/831
AB  - Inverse gas chromatography under finite surface coverage conditions (IGC-FC) was used for the investigation of sorption of hexane, benzene, chloroform and tetrahydrofuran on macroporous crosslinked poly[(glycidyl methacrylate)-co-(ethylene glycol dimethacrylate)], poly(GMA-co-EGDMA), and copolymer modified with ethylene diamine, EDA, poly(GMA-co-EGDMA)-en, in the temperature range 333-363 K. Two poly(GMA-co-EGDMA) samples with different porosity parameters were synthesized by suspension copolymerization and modified using a ring-opening reaction of the pendant epoxy groups with EDA. The specific surface areas of the initial and modified copolymer samples were determined by the BET method from low temperature nitro- gen adsorption isotherms (77 K). The adsorption isotherms determined from chromatographic peaks of adsorbates were analyzed using the BET theoretical model and used for estimation of the surface area, isosteric heat of adsorption and the adsorption energy distribution on the surface of the initial and modified copolymer samples. It was observed that the adsorbate nature and the properties of the solid surface of the initial and modified copolymer governed the uptake of adsorbate by the copolymer. The deviations observed for the Sa values obtained by the BET method from the low temperature nitrogen adsorption isotherms and hexane was attributed not only to the difference in molecule size, but also to the specific polymer-adsorbate interactions. The isosteric heat of adsorption approached a constant value with increasing adsorbate loading. A large variation in the shapes of the q(st)-alpha curves resulted from strong acid-base interactions, as well as dissolution phenomena. Of the four studied adsorbates, chloroform was shown to have the greatest affinity towards the surface of the investigated polymer samples.
PB  - Wiley-VCH Verlag Gmbh, Weinheim
T2  - Macromolecular Materials and Engineering
T1  - Characterization of glycidyl methacrylate based copolymers by inverse gas chromatography under finite surface coverage
EP  - 890
IS  - 9
SP  - 884
VL  - 290
DO  - 10.1002/mame.200500137
ER  - 

@article{
author = "Nastasović, Aleksandra and Onjia, Antonije and Milonjić, Slobodan K. and Vuković, Zorica M. and Jovanović, SM",
year = "2005",
abstract = "Inverse gas chromatography under finite surface coverage conditions (IGC-FC) was used for the investigation of sorption of hexane, benzene, chloroform and tetrahydrofuran on macroporous crosslinked poly[(glycidyl methacrylate)-co-(ethylene glycol dimethacrylate)], poly(GMA-co-EGDMA), and copolymer modified with ethylene diamine, EDA, poly(GMA-co-EGDMA)-en, in the temperature range 333-363 K. Two poly(GMA-co-EGDMA) samples with different porosity parameters were synthesized by suspension copolymerization and modified using a ring-opening reaction of the pendant epoxy groups with EDA. The specific surface areas of the initial and modified copolymer samples were determined by the BET method from low temperature nitro- gen adsorption isotherms (77 K). The adsorption isotherms determined from chromatographic peaks of adsorbates were analyzed using the BET theoretical model and used for estimation of the surface area, isosteric heat of adsorption and the adsorption energy distribution on the surface of the initial and modified copolymer samples. It was observed that the adsorbate nature and the properties of the solid surface of the initial and modified copolymer governed the uptake of adsorbate by the copolymer. The deviations observed for the Sa values obtained by the BET method from the low temperature nitrogen adsorption isotherms and hexane was attributed not only to the difference in molecule size, but also to the specific polymer-adsorbate interactions. The isosteric heat of adsorption approached a constant value with increasing adsorbate loading. A large variation in the shapes of the q(st)-alpha curves resulted from strong acid-base interactions, as well as dissolution phenomena. Of the four studied adsorbates, chloroform was shown to have the greatest affinity towards the surface of the investigated polymer samples.",
publisher = "Wiley-VCH Verlag Gmbh, Weinheim",
journal = "Macromolecular Materials and Engineering",
title = "Characterization of glycidyl methacrylate based copolymers by inverse gas chromatography under finite surface coverage",
pages = "890-884",
number = "9",
volume = "290",
doi = "10.1002/mame.200500137"
}

Nastasović, A., Onjia, A., Milonjić, S. K., Vuković, Z. M.,& Jovanović, S.. (2005). Characterization of glycidyl methacrylate based copolymers by inverse gas chromatography under finite surface coverage. in Macromolecular Materials and Engineering
Wiley-VCH Verlag Gmbh, Weinheim., 290(9), 884-890.
https://doi.org/10.1002/mame.200500137

Nastasović A, Onjia A, Milonjić SK, Vuković ZM, Jovanović S. Characterization of glycidyl methacrylate based copolymers by inverse gas chromatography under finite surface coverage. in Macromolecular Materials and Engineering. 2005;290(9):884-890.
doi:10.1002/mame.200500137 .

Nastasović, Aleksandra, Onjia, Antonije, Milonjić, Slobodan K., Vuković, Zorica M., Jovanović, SM, "Characterization of glycidyl methacrylate based copolymers by inverse gas chromatography under finite surface coverage" in Macromolecular Materials and Engineering, 290, no. 9 (2005):884-890,
https://doi.org/10.1002/mame.200500137 . .

TY  - JOUR
AU  - Nastasović, Aleksandra
AU  - Onjia, Antonije
AU  - Milonjić, Slobodan K.
AU  - Jovanović, SM
PY  - 2005
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/818
AB  - Two samples of macroporous crosslinked poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate), PGME, with different porosity parameters were synthesized by suspension copolymerization and modified by ring-opening reaction of the pendant epoxy groups with ethylene diamine, EDA. Inverse gas chromatography at infinite dilution was used for the determination of adsorption properties of PGME, and copolymer modified with ethylene diamine, PGME-en. Thermodynamic parameters of adsorption, dispersive components of the surface free energies, and the S, acid/base constants for the copolymer samples were calculated. The calculated dispersive surface energy values, gamma(d)(S), for PGME and PGME-en are comparable with the literature data for nonconductive polymers.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - European Polymer Journal
T1  - Surface characterization of macroporous glycidyl methacrylate based copolymers by inverse gas chromatography
EP  - 1242
IS  - 6
SP  - 1234
VL  - 41
DO  - 10.1016/j.eurpolymj.2004.12.020
ER  - 

@article{
author = "Nastasović, Aleksandra and Onjia, Antonije and Milonjić, Slobodan K. and Jovanović, SM",
year = "2005",
abstract = "Two samples of macroporous crosslinked poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate), PGME, with different porosity parameters were synthesized by suspension copolymerization and modified by ring-opening reaction of the pendant epoxy groups with ethylene diamine, EDA. Inverse gas chromatography at infinite dilution was used for the determination of adsorption properties of PGME, and copolymer modified with ethylene diamine, PGME-en. Thermodynamic parameters of adsorption, dispersive components of the surface free energies, and the S, acid/base constants for the copolymer samples were calculated. The calculated dispersive surface energy values, gamma(d)(S), for PGME and PGME-en are comparable with the literature data for nonconductive polymers.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "European Polymer Journal",
title = "Surface characterization of macroporous glycidyl methacrylate based copolymers by inverse gas chromatography",
pages = "1242-1234",
number = "6",
volume = "41",
doi = "10.1016/j.eurpolymj.2004.12.020"
}

Nastasović, A., Onjia, A., Milonjić, S. K.,& Jovanović, S.. (2005). Surface characterization of macroporous glycidyl methacrylate based copolymers by inverse gas chromatography. in European Polymer Journal
Pergamon-Elsevier Science Ltd, Oxford., 41(6), 1234-1242.
https://doi.org/10.1016/j.eurpolymj.2004.12.020

Nastasović A, Onjia A, Milonjić SK, Jovanović S. Surface characterization of macroporous glycidyl methacrylate based copolymers by inverse gas chromatography. in European Polymer Journal. 2005;41(6):1234-1242.
doi:10.1016/j.eurpolymj.2004.12.020 .

Nastasović, Aleksandra, Onjia, Antonije, Milonjić, Slobodan K., Jovanović, SM, "Surface characterization of macroporous glycidyl methacrylate based copolymers by inverse gas chromatography" in European Polymer Journal, 41, no. 6 (2005):1234-1242,
https://doi.org/10.1016/j.eurpolymj.2004.12.020 . .

TY  - JOUR
AU  - Onjia, Antonije
AU  - Milonjić, Slobodan K.
AU  - Jovanović, NN
AU  - Jovanović, SM
PY  - 2000
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/282
AB  - Adsorption properties of two laboratory synthesized macroporous copolymers based on methyl and glycidyl methacrylate were investigated by inverse gas chromatography. Retentions of 12 organic compounds were measured in the temperature range from 65 to 80 degrees C. The gas/solid partition coefficients and the related thermodynamic function of adsorption at zero surface coverage were determined. The dispersive component of free surface energy of both copolymers, at investigated temperatures, was also calculated. The obtained experimental data were used to explain the polymer-adsorbate interaction.
PB  - Elsevier, Amsterdam
T2  - Reactive & Functional Polymers
T1  - An inverse gas chromatography study of macroporous copolymers based on methyl and glycidyl methacrylate
EP  - 277
IS  - 3
SP  - 269
VL  - 43
DO  - 10.1016/S1381-5148(99)00053-X
ER  - 

@article{
author = "Onjia, Antonije and Milonjić, Slobodan K. and Jovanović, NN and Jovanović, SM",
year = "2000",
abstract = "Adsorption properties of two laboratory synthesized macroporous copolymers based on methyl and glycidyl methacrylate were investigated by inverse gas chromatography. Retentions of 12 organic compounds were measured in the temperature range from 65 to 80 degrees C. The gas/solid partition coefficients and the related thermodynamic function of adsorption at zero surface coverage were determined. The dispersive component of free surface energy of both copolymers, at investigated temperatures, was also calculated. The obtained experimental data were used to explain the polymer-adsorbate interaction.",
publisher = "Elsevier, Amsterdam",
journal = "Reactive & Functional Polymers",
title = "An inverse gas chromatography study of macroporous copolymers based on methyl and glycidyl methacrylate",
pages = "277-269",
number = "3",
volume = "43",
doi = "10.1016/S1381-5148(99)00053-X"
}

Onjia, A., Milonjić, S. K., Jovanović, N.,& Jovanović, S.. (2000). An inverse gas chromatography study of macroporous copolymers based on methyl and glycidyl methacrylate. in Reactive & Functional Polymers
Elsevier, Amsterdam., 43(3), 269-277.
https://doi.org/10.1016/S1381-5148(99)00053-X

Onjia A, Milonjić SK, Jovanović N, Jovanović S. An inverse gas chromatography study of macroporous copolymers based on methyl and glycidyl methacrylate. in Reactive & Functional Polymers. 2000;43(3):269-277.
doi:10.1016/S1381-5148(99)00053-X .

Onjia, Antonije, Milonjić, Slobodan K., Jovanović, NN, Jovanović, SM, "An inverse gas chromatography study of macroporous copolymers based on methyl and glycidyl methacrylate" in Reactive & Functional Polymers, 43, no. 3 (2000):269-277,
https://doi.org/10.1016/S1381-5148(99)00053-X . .

TY  - JOUR
AU  - Krstajić, Nedeljko V.
AU  - Grgur, Branimir
AU  - Jovanović, SM
AU  - Vojnović, MV
PY  - 1997
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/106
AB  - The corrosion behaviour of mild steel covered by the electrodeposited polypyrrole films was investigated by electrochemical impedance spectroscopy. Electrodeposition of polypyrrole was performed from aqueous solution of pyrrole and oxalic acid at a constant current density of 1 mA cm(-2) and yields strongly adherent and smooth polymer layers. The impedance spectra were treated through the nonlinear least squares (NLS) fitting to estimate the parameters of the proposed equivalent circuit, based on physical model for the corrosion of mild steel protected by polypyrrole films in acid sulfate solutions.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Electrochimica Acta
T1  - Corrosion protection of mild steel by polypyrrole coatings in acid sulfate solutions
EP  - 1691
IS  - 11
SP  - 1685
VL  - 42
DO  - 10.1016/S0013-4686(96)00313-1
ER  - 

@article{
author = "Krstajić, Nedeljko V. and Grgur, Branimir and Jovanović, SM and Vojnović, MV",
year = "1997",
abstract = "The corrosion behaviour of mild steel covered by the electrodeposited polypyrrole films was investigated by electrochemical impedance spectroscopy. Electrodeposition of polypyrrole was performed from aqueous solution of pyrrole and oxalic acid at a constant current density of 1 mA cm(-2) and yields strongly adherent and smooth polymer layers. The impedance spectra were treated through the nonlinear least squares (NLS) fitting to estimate the parameters of the proposed equivalent circuit, based on physical model for the corrosion of mild steel protected by polypyrrole films in acid sulfate solutions.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Electrochimica Acta",
title = "Corrosion protection of mild steel by polypyrrole coatings in acid sulfate solutions",
pages = "1691-1685",
number = "11",
volume = "42",
doi = "10.1016/S0013-4686(96)00313-1"
}

Krstajić, N. V., Grgur, B., Jovanović, S.,& Vojnović, M.. (1997). Corrosion protection of mild steel by polypyrrole coatings in acid sulfate solutions. in Electrochimica Acta
Pergamon-Elsevier Science Ltd, Oxford., 42(11), 1685-1691.
https://doi.org/10.1016/S0013-4686(96)00313-1

Krstajić NV, Grgur B, Jovanović S, Vojnović M. Corrosion protection of mild steel by polypyrrole coatings in acid sulfate solutions. in Electrochimica Acta. 1997;42(11):1685-1691.
doi:10.1016/S0013-4686(96)00313-1 .

Krstajić, Nedeljko V., Grgur, Branimir, Jovanović, SM, Vojnović, MV, "Corrosion protection of mild steel by polypyrrole coatings in acid sulfate solutions" in Electrochimica Acta, 42, no. 11 (1997):1685-1691,
https://doi.org/10.1016/S0013-4686(96)00313-1 . .