TY  - JOUR
AU  - Nastasović, Aleksandra B.
AU  - Onjia, Antonije E.
AU  - Milonjić, Slobodan K.
AU  - Vuković, Zorica M.
AU  - Jovanović, S. M.
PY  - 2005
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2933
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.
T2  - Macromolecular Materials and Engineering
T1  - Characterization of glycidyl methacrylate based copolymers by inverse gas chromatography under finite surface coverage
VL  - 290
IS  - 9
SP  - 884
EP  - 890
DO  - 10.1002/mame.200500137
ER  - 

@article{
author = "Nastasović, Aleksandra B. and Onjia, Antonije E. and Milonjić, Slobodan K. and Vuković, Zorica M. and Jovanović, S. M.",
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.",
journal = "Macromolecular Materials and Engineering",
title = "Characterization of glycidyl methacrylate based copolymers by inverse gas chromatography under finite surface coverage",
volume = "290",
number = "9",
pages = "884-890",
doi = "10.1002/mame.200500137"
}

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

Nastasović AB, Onjia AE, Milonjić SK, Vuković ZM, Jovanović SM. 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 B., Onjia, Antonije E., Milonjić, Slobodan K., Vuković, Zorica M., Jovanović, S. M., "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 B.
AU  - Onjia, Antonije E.
AU  - Milonjić, Slobodan K.
AU  - Jovanović, S. M.
PY  - 2005
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2921
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(1)(infinity), and Flory-Huggins interaction parameters, chi(12)(infinity), 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. (c) 2005 Wiley Periodicals, Inc.
T2  - Journal of Polymer Science. Part B: Polymer Physics
T1  - Determination of thermodynamic properties of macroporous glycidyl methacrylate-based copolymers by inverse gas chromatography
VL  - 43
IS  - 18
SP  - 2524
EP  - 2533
DO  - 10.1002/polb.20538
ER  - 

@article{
author = "Nastasović, Aleksandra B. and Onjia, Antonije E. and Milonjić, Slobodan K. and Jovanović, S. M.",
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(1)(infinity), and Flory-Huggins interaction parameters, chi(12)(infinity), 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. (c) 2005 Wiley Periodicals, Inc.",
journal = "Journal of Polymer Science. Part B: Polymer Physics",
title = "Determination of thermodynamic properties of macroporous glycidyl methacrylate-based copolymers by inverse gas chromatography",
volume = "43",
number = "18",
pages = "2524-2533",
doi = "10.1002/polb.20538"
}

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

Nastasović AB, Onjia AE, Milonjić SK, 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. 2005;43(18):2524-2533.
doi:10.1002/polb.20538 .

Nastasović, Aleksandra B., Onjia, Antonije E., Milonjić, Slobodan K., Jovanović, S. M., "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 B.
AU  - Onjia, Antonije E.
AU  - Milonjić, Slobodan K.
AU  - Jovanović, S. M.
PY  - 2005
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2888
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, and gamma;(d)(S), for PGME and PGME-en are comparable with the literature data for nonconductive polymers. and COPY; 2005 Elsevier Ltd. All rights reserved.
T2  - European Polymer Journal
T1  - Surface characterization of macroporous glycidyl methacrylate based copolymers by inverse gas chromatography
VL  - 41
IS  - 6
SP  - 1234
EP  - 1242
DO  - 10.1016/j.eurpolymj.2004.12.020
ER  - 

@article{
author = "Nastasović, Aleksandra B. and Onjia, Antonije E. and Milonjić, Slobodan K. and Jovanović, S. M.",
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, and gamma;(d)(S), for PGME and PGME-en are comparable with the literature data for nonconductive polymers. and COPY; 2005 Elsevier Ltd. All rights reserved.",
journal = "European Polymer Journal",
title = "Surface characterization of macroporous glycidyl methacrylate based copolymers by inverse gas chromatography",
volume = "41",
number = "6",
pages = "1234-1242",
doi = "10.1016/j.eurpolymj.2004.12.020"
}

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

Nastasović AB, Onjia AE, Milonjić SK, Jovanović SM. 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 B., Onjia, Antonije E., Milonjić, Slobodan K., Jovanović, S. M., "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 E.
AU  - Milonjić, Slobodan K.
AU  - Jovanović, NN
AU  - Jovanović, S. M.
PY  - 2000
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2330
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. (C) 2000 Elsevier Science B.V. All rights reserved.
T2  - Reactive and Functional Polymers
T1  - An inverse gas chromatography study of macroporous copolymers based on methyl and glycidyl methacrylate
VL  - 43
IS  - 3
SP  - 269
EP  - 277
DO  - 10.1016/S1381-5148(99)00053-X
ER  - 

@article{
author = "Onjia, Antonije E. and Milonjić, Slobodan K. and Jovanović, NN and Jovanović, S. M.",
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. (C) 2000 Elsevier Science B.V. All rights reserved.",
journal = "Reactive and Functional Polymers",
title = "An inverse gas chromatography study of macroporous copolymers based on methyl and glycidyl methacrylate",
volume = "43",
number = "3",
pages = "269-277",
doi = "10.1016/S1381-5148(99)00053-X"
}

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

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

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