TY  - JOUR
AU  - Nastasović, Aleksandra
AU  - Onjia, Antonije E.
AU  - Milonjić, Slobodan K.
AU  - Vuković, Zorica
AU  - Jovanovic, SM
PY  - 2005
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/186
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-V C H Verlag Gmbh, Weinheim
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 and Onjia, Antonije E. and Milonjić, Slobodan K. and Vuković, Zorica and Jovanovic, 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-V C H Verlag Gmbh, Weinheim",
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., Onjia, A. E., Milonjić, S. K., Vuković, Z.,& Jovanovic, S.. (2005). Characterization of glycidyl methacrylate based copolymers by inverse gas chromatography under finite surface coverage. in Macromolecular Materials and Engineering
Wiley-V C H Verlag Gmbh, Weinheim., 290(9), 884-890.
https://doi.org/10.1002/mame.200500137

Nastasović A, Onjia AE, Milonjić SK, Vuković Z, Jovanovic 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 E., Milonjić, Slobodan K., Vuković, Zorica, Jovanovic, 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 E.
AU  - Milonjić, Slobodan K.
AU  - Jovanovic, SM
PY  - 2005
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/188
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
VL  - 43
IS  - 18
SP  - 2524
EP  - 2533
DO  - 10.1002/polb.20538
ER  - 

@article{
author = "Nastasović, Aleksandra and Onjia, Antonije E. and Milonjić, Slobodan K. and Jovanovic, 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",
volume = "43",
number = "18",
pages = "2524-2533",
doi = "10.1002/polb.20538"
}

Nastasović, A., Onjia, A. E., Milonjić, S. K.,& Jovanovic, 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 AE, Milonjić SK, Jovanovic 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 E., Milonjić, Slobodan K., Jovanovic, 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 . .