TY  - JOUR
AU  - Panić, Vesna
AU  - Jovanović, J.
AU  - Adnađević, Borivoj
AU  - Veličković, Jovan S.
PY  - 2009
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1441
AB  - Hydrogels based on crosslinked polymethacrylic acid were synthesized via free-radical polymerization in aqueous solution, using N,N'-methylene bisacrylamide as a crosslinking agent and 2,2'-azobis-[2-(2-imidazolin-2-yl)propane] dihydrochloride as an initiator. The influence of the reaction parameters (the neutralization degree of methacrylic acid and the initial monomer concentration) on the equilibrium swelling degree, the swelling kinetic parameters and the basic structural properties of xerogels was investigated. The change of synthesis parameters leads to the change of the basic structural parameters of xerogel, as well as the equilibrium swelling degree and the initial swelling rate of the hydrogels. It is found that there are power form relationships between the equilibrium swelling degree, the initial swelling rate and the structural xerogel's properties and the change of the neutralization degree of monomer, i.e. the monomer concentration. The examined correlations proved that the crosslinking density is the crucial parameter which determines all the other investigated structural and swelling parameters.
PB  - Maik Nauka/Interperiodica/Springer, New York
T2  - Russian Journal of Physical Chemistry A
T1  - Effect of synthesis parameters on polymethacrylic acid xerogel structures and equilibrium swelling
EP  - 1562
IS  - 9
SP  - 1558
VL  - 83
DO  - 10.1134/S003602440909026X
ER  - 

@article{
author = "Panić, Vesna and Jovanović, J. and Adnađević, Borivoj and Veličković, Jovan S.",
year = "2009",
abstract = "Hydrogels based on crosslinked polymethacrylic acid were synthesized via free-radical polymerization in aqueous solution, using N,N'-methylene bisacrylamide as a crosslinking agent and 2,2'-azobis-[2-(2-imidazolin-2-yl)propane] dihydrochloride as an initiator. The influence of the reaction parameters (the neutralization degree of methacrylic acid and the initial monomer concentration) on the equilibrium swelling degree, the swelling kinetic parameters and the basic structural properties of xerogels was investigated. The change of synthesis parameters leads to the change of the basic structural parameters of xerogel, as well as the equilibrium swelling degree and the initial swelling rate of the hydrogels. It is found that there are power form relationships between the equilibrium swelling degree, the initial swelling rate and the structural xerogel's properties and the change of the neutralization degree of monomer, i.e. the monomer concentration. The examined correlations proved that the crosslinking density is the crucial parameter which determines all the other investigated structural and swelling parameters.",
publisher = "Maik Nauka/Interperiodica/Springer, New York",
journal = "Russian Journal of Physical Chemistry A",
title = "Effect of synthesis parameters on polymethacrylic acid xerogel structures and equilibrium swelling",
pages = "1562-1558",
number = "9",
volume = "83",
doi = "10.1134/S003602440909026X"
}

Panić, V., Jovanović, J., Adnađević, B.,& Veličković, J. S.. (2009). Effect of synthesis parameters on polymethacrylic acid xerogel structures and equilibrium swelling. in Russian Journal of Physical Chemistry A
Maik Nauka/Interperiodica/Springer, New York., 83(9), 1558-1562.
https://doi.org/10.1134/S003602440909026X

Panić V, Jovanović J, Adnađević B, Veličković JS. Effect of synthesis parameters on polymethacrylic acid xerogel structures and equilibrium swelling. in Russian Journal of Physical Chemistry A. 2009;83(9):1558-1562.
doi:10.1134/S003602440909026X .

Panić, Vesna, Jovanović, J., Adnađević, Borivoj, Veličković, Jovan S., "Effect of synthesis parameters on polymethacrylic acid xerogel structures and equilibrium swelling" in Russian Journal of Physical Chemistry A, 83, no. 9 (2009):1558-1562,
https://doi.org/10.1134/S003602440909026X . .

TY  - JOUR
AU  - Popović, Ivanka
AU  - Katsikas, Lynne
AU  - Veličković, Jovan S.
PY  - 2005
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/821
AB  - The residues remaining after the thermal degradation of poly(di-n-alkyl itaconates) with ester substituents ranging from methyl to n-octyl were studied. It was found that the thermal stability of the polymers decreased with increasing size of the alkyl group. Depolymerisation was the main degradation pathway with the depolymerisation zip length being very small and independent of the alkyl substituent. The number of bonds broken per monomer unit, s/P-0, increased with increasing temperature and time of degradation, as well as with increasing size of the alkyl substituent. The threshold temperature of degradation of each polymer was calculated from the values of s/P-0. At lower degradation temperatures and times branching occurs in PDBI and PDHI and crosslinking in PDOI.
PB  - Elsevier Sci Ltd, Oxford
T2  - Polymer Degradation and Stability
T1  - The non-oxidative thermal degradation of poly(di-n-alkyl itaconates). II. Analysis of the polymer residue
EP  - 174
IS  - 1
SP  - 165
VL  - 89
DO  - 10.1016/j.polymdegradstab.2005.01.013
ER  - 

@article{
author = "Popović, Ivanka and Katsikas, Lynne and Veličković, Jovan S.",
year = "2005",
abstract = "The residues remaining after the thermal degradation of poly(di-n-alkyl itaconates) with ester substituents ranging from methyl to n-octyl were studied. It was found that the thermal stability of the polymers decreased with increasing size of the alkyl group. Depolymerisation was the main degradation pathway with the depolymerisation zip length being very small and independent of the alkyl substituent. The number of bonds broken per monomer unit, s/P-0, increased with increasing temperature and time of degradation, as well as with increasing size of the alkyl substituent. The threshold temperature of degradation of each polymer was calculated from the values of s/P-0. At lower degradation temperatures and times branching occurs in PDBI and PDHI and crosslinking in PDOI.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Polymer Degradation and Stability",
title = "The non-oxidative thermal degradation of poly(di-n-alkyl itaconates). II. Analysis of the polymer residue",
pages = "174-165",
number = "1",
volume = "89",
doi = "10.1016/j.polymdegradstab.2005.01.013"
}

Popović, I., Katsikas, L.,& Veličković, J. S.. (2005). The non-oxidative thermal degradation of poly(di-n-alkyl itaconates). II. Analysis of the polymer residue. in Polymer Degradation and Stability
Elsevier Sci Ltd, Oxford., 89(1), 165-174.
https://doi.org/10.1016/j.polymdegradstab.2005.01.013

Popović I, Katsikas L, Veličković JS. The non-oxidative thermal degradation of poly(di-n-alkyl itaconates). II. Analysis of the polymer residue. in Polymer Degradation and Stability. 2005;89(1):165-174.
doi:10.1016/j.polymdegradstab.2005.01.013 .

Popović, Ivanka, Katsikas, Lynne, Veličković, Jovan S., "The non-oxidative thermal degradation of poly(di-n-alkyl itaconates). II. Analysis of the polymer residue" in Polymer Degradation and Stability, 89, no. 1 (2005):165-174,
https://doi.org/10.1016/j.polymdegradstab.2005.01.013 . .

TY  - JOUR
AU  - Popović, Ivanka
AU  - Katsikas, Lynne
AU  - Veličković, Jovan S.
PY  - 2005
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/820
AB  - The volatiles arising from the thermal degradation of poly(di-n-alkyl itaconates) with ester substituents ranging from methyl to n-octyl were analysed. The corresponding monomer was found to be the major degradation product. A significant amount of itaconic acid in the volatiles was also found in the case of poly(diethyl itaconate). A detailed mechanism of the thermal degradation of the studied polymers is given.
PB  - Elsevier Sci Ltd, Oxford
T2  - Polymer Degradation and Stability
T1  - The non-oxidative thermal degradation of poly(di-n-alkyl itaconates). I. Analysis of the thermolysis volatiles
EP  - 164
IS  - 1
SP  - 153
VL  - 89
DO  - 10.1016/j.polymdegradstab.2005.01.012
ER  - 

@article{
author = "Popović, Ivanka and Katsikas, Lynne and Veličković, Jovan S.",
year = "2005",
abstract = "The volatiles arising from the thermal degradation of poly(di-n-alkyl itaconates) with ester substituents ranging from methyl to n-octyl were analysed. The corresponding monomer was found to be the major degradation product. A significant amount of itaconic acid in the volatiles was also found in the case of poly(diethyl itaconate). A detailed mechanism of the thermal degradation of the studied polymers is given.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Polymer Degradation and Stability",
title = "The non-oxidative thermal degradation of poly(di-n-alkyl itaconates). I. Analysis of the thermolysis volatiles",
pages = "164-153",
number = "1",
volume = "89",
doi = "10.1016/j.polymdegradstab.2005.01.012"
}

Popović, I., Katsikas, L.,& Veličković, J. S.. (2005). The non-oxidative thermal degradation of poly(di-n-alkyl itaconates). I. Analysis of the thermolysis volatiles. in Polymer Degradation and Stability
Elsevier Sci Ltd, Oxford., 89(1), 153-164.
https://doi.org/10.1016/j.polymdegradstab.2005.01.012

Popović I, Katsikas L, Veličković JS. The non-oxidative thermal degradation of poly(di-n-alkyl itaconates). I. Analysis of the thermolysis volatiles. in Polymer Degradation and Stability. 2005;89(1):153-164.
doi:10.1016/j.polymdegradstab.2005.01.012 .

Popović, Ivanka, Katsikas, Lynne, Veličković, Jovan S., "The non-oxidative thermal degradation of poly(di-n-alkyl itaconates). I. Analysis of the thermolysis volatiles" in Polymer Degradation and Stability, 89, no. 1 (2005):153-164,
https://doi.org/10.1016/j.polymdegradstab.2005.01.012 . .

TY  - JOUR
AU  - Bošković, G.
AU  - Katsikas, Lynne
AU  - Veličković, Jovan S.
AU  - Popović, Ivanka
PY  - 2000
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/308
AB  - The non-oxidative thermal degradation mechanism of poly(di-n-propyl-) (PDnPI) and poly(di-iso-propyl itaconate) (PDnPI) were investigated and compared to the structurally similar polymethacrylates. Analogous to the corresponding polymethacrylates, PDnPI thermally decomposes predominantly by depolymerisation, whereas a considerable amount of side chain scission occurs during the thermal degradation of PDiPI. The thus formed carboxyl groups decarboxylate at elevated temperatures forming a carbonaceous residue.
PB  - Elsevier Sci Ltd, Oxford
T2  - Polymer
T1  - The thermal degradation of poly(di-n-propyl itaconate) and poly(di-iso-propyl itaconate)
EP  - 5775
IS  - 15
SP  - 5769
VL  - 41
DO  - 10.1016/S0032-3861(99)00804-6
ER  - 

@article{
author = "Bošković, G. and Katsikas, Lynne and Veličković, Jovan S. and Popović, Ivanka",
year = "2000",
abstract = "The non-oxidative thermal degradation mechanism of poly(di-n-propyl-) (PDnPI) and poly(di-iso-propyl itaconate) (PDnPI) were investigated and compared to the structurally similar polymethacrylates. Analogous to the corresponding polymethacrylates, PDnPI thermally decomposes predominantly by depolymerisation, whereas a considerable amount of side chain scission occurs during the thermal degradation of PDiPI. The thus formed carboxyl groups decarboxylate at elevated temperatures forming a carbonaceous residue.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Polymer",
title = "The thermal degradation of poly(di-n-propyl itaconate) and poly(di-iso-propyl itaconate)",
pages = "5775-5769",
number = "15",
volume = "41",
doi = "10.1016/S0032-3861(99)00804-6"
}

Bošković, G., Katsikas, L., Veličković, J. S.,& Popović, I.. (2000). The thermal degradation of poly(di-n-propyl itaconate) and poly(di-iso-propyl itaconate). in Polymer
Elsevier Sci Ltd, Oxford., 41(15), 5769-5775.
https://doi.org/10.1016/S0032-3861(99)00804-6

Bošković G, Katsikas L, Veličković JS, Popović I. The thermal degradation of poly(di-n-propyl itaconate) and poly(di-iso-propyl itaconate). in Polymer. 2000;41(15):5769-5775.
doi:10.1016/S0032-3861(99)00804-6 .

Bošković, G., Katsikas, Lynne, Veličković, Jovan S., Popović, Ivanka, "The thermal degradation of poly(di-n-propyl itaconate) and poly(di-iso-propyl itaconate)" in Polymer, 41, no. 15 (2000):5769-5775,
https://doi.org/10.1016/S0032-3861(99)00804-6 . .

TY  - JOUR
AU  - Katsikas, Lynne
AU  - Bošković, G.
AU  - Veličković, Sava
AU  - Veličković, Jovan S.
AU  - Popović, Ivanka
PY  - 2000
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/297
AB  - Non-oxidative and oxidative thermogravimetry was performed on poly(di-n-propyl-) (PDnPI), poly(di-iso-propyl-) (PDiPI), poly(di-n-butyl-) (PDnBI), poly(di-iso-butyl-) (PDiBI) and poly(di-sec-butyl itaconate) (PDsBI). The results show that PDiPI and PDsBI thermally degrade in a similar manner with deesterification being, together with depolymerisation, a significant mechanism. PDnPI and PDnBI also degrade in a similar manner by depolymerisation, with chain end initiation being more important than random main chain scission initiation. The results for PDiBI indicate more similarity to the n-alkyl esters than to the other branched chain esters although, there are indications that also with this polymer ester decomposition is not an insignificant thermal degradation mechanism, although little can be said about the mechanism of oxidative thermal degradation of these polymers. the kinetic data again show the similarity between PDnPI and PDnBI on the one hand, and PDiPI and PDsBI on the other. Also, in an oxidative atmosphere, PDiBI shows more similarity to the n-alkyl esters than to PDiPI and PDsBI. It would appear that, as with the polymethacrylates, the number of beta-hydrogen atoms in the ester substituents plays a dominant role in determining the mechanism of both the thermal and thermo-oxidative degradation of these polymers.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - European Polymer Journal
T1  - The kinetics of the thermal degradation of isomeric dipropyl and dibutyl esters of poly(itaconic acid)
EP  - 1628
IS  - 8
SP  - 1619
VL  - 36
DO  - 10.1016/S0014-3057(99)00246-3
ER  - 

@article{
author = "Katsikas, Lynne and Bošković, G. and Veličković, Sava and Veličković, Jovan S. and Popović, Ivanka",
year = "2000",
abstract = "Non-oxidative and oxidative thermogravimetry was performed on poly(di-n-propyl-) (PDnPI), poly(di-iso-propyl-) (PDiPI), poly(di-n-butyl-) (PDnBI), poly(di-iso-butyl-) (PDiBI) and poly(di-sec-butyl itaconate) (PDsBI). The results show that PDiPI and PDsBI thermally degrade in a similar manner with deesterification being, together with depolymerisation, a significant mechanism. PDnPI and PDnBI also degrade in a similar manner by depolymerisation, with chain end initiation being more important than random main chain scission initiation. The results for PDiBI indicate more similarity to the n-alkyl esters than to the other branched chain esters although, there are indications that also with this polymer ester decomposition is not an insignificant thermal degradation mechanism, although little can be said about the mechanism of oxidative thermal degradation of these polymers. the kinetic data again show the similarity between PDnPI and PDnBI on the one hand, and PDiPI and PDsBI on the other. Also, in an oxidative atmosphere, PDiBI shows more similarity to the n-alkyl esters than to PDiPI and PDsBI. It would appear that, as with the polymethacrylates, the number of beta-hydrogen atoms in the ester substituents plays a dominant role in determining the mechanism of both the thermal and thermo-oxidative degradation of these polymers.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "European Polymer Journal",
title = "The kinetics of the thermal degradation of isomeric dipropyl and dibutyl esters of poly(itaconic acid)",
pages = "1628-1619",
number = "8",
volume = "36",
doi = "10.1016/S0014-3057(99)00246-3"
}

Katsikas, L., Bošković, G., Veličković, S., Veličković, J. S.,& Popović, I.. (2000). The kinetics of the thermal degradation of isomeric dipropyl and dibutyl esters of poly(itaconic acid). in European Polymer Journal
Pergamon-Elsevier Science Ltd, Oxford., 36(8), 1619-1628.
https://doi.org/10.1016/S0014-3057(99)00246-3

Katsikas L, Bošković G, Veličković S, Veličković JS, Popović I. The kinetics of the thermal degradation of isomeric dipropyl and dibutyl esters of poly(itaconic acid). in European Polymer Journal. 2000;36(8):1619-1628.
doi:10.1016/S0014-3057(99)00246-3 .

Katsikas, Lynne, Bošković, G., Veličković, Sava, Veličković, Jovan S., Popović, Ivanka, "The kinetics of the thermal degradation of isomeric dipropyl and dibutyl esters of poly(itaconic acid)" in European Polymer Journal, 36, no. 8 (2000):1619-1628,
https://doi.org/10.1016/S0014-3057(99)00246-3 . .

TY  - JOUR
AU  - Popović, Ivanka
AU  - Katsikas, Lynne
AU  - Veličković, Jovan S.
PY  - 2000
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/321
AB  - The thermal degradation of poly(di-itaconates) is discussed with special emphasis on the Influence of the nature of the ester substituent. It was established that the following reactions occur during the thermal degradation of these polymers: depolymerisatlon, de-estehfication, elimination, crosslinking, random main and/or side chain scission and carbonisation. Depolymerisation is the predominant degradation pathway and it may be initiated by end chain and random main and/or side chain scission.
AB  - Termička degradacija poli(di-itakonata) je analizirana sa posebnim osvrtom na uticaj prirode estarskog supstituent. Utvrđeno je da se sledeće reakcije odvijaju tokom degradacije ovih polimera: depolimerizacija, de-esterifikacija, eliminacija, umrežavanje, nasumično raskidanje veze u osnovnom i/ili bočnom lancu i karbonizacija. Depolimerizacija je preovlađujući mehanizam degradacije i može se inicirati β-kidanjem i nasumičnim raskidanjem veze u osnovnom i/ili bočnom lancu.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - The thermal degradation of poly(di-itaconates)
T1  - Termička degradacija poli(di-itakonata)
EP  - 497
IS  - 11
SP  - 494
VL  - 54
UR  - https://hdl.handle.net/21.15107/rcub_technorep_321
ER  - 

@article{
author = "Popović, Ivanka and Katsikas, Lynne and Veličković, Jovan S.",
year = "2000",
abstract = "The thermal degradation of poly(di-itaconates) is discussed with special emphasis on the Influence of the nature of the ester substituent. It was established that the following reactions occur during the thermal degradation of these polymers: depolymerisatlon, de-estehfication, elimination, crosslinking, random main and/or side chain scission and carbonisation. Depolymerisation is the predominant degradation pathway and it may be initiated by end chain and random main and/or side chain scission., Termička degradacija poli(di-itakonata) je analizirana sa posebnim osvrtom na uticaj prirode estarskog supstituent. Utvrđeno je da se sledeće reakcije odvijaju tokom degradacije ovih polimera: depolimerizacija, de-esterifikacija, eliminacija, umrežavanje, nasumično raskidanje veze u osnovnom i/ili bočnom lancu i karbonizacija. Depolimerizacija je preovlađujući mehanizam degradacije i može se inicirati β-kidanjem i nasumičnim raskidanjem veze u osnovnom i/ili bočnom lancu.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "The thermal degradation of poly(di-itaconates), Termička degradacija poli(di-itakonata)",
pages = "497-494",
number = "11",
volume = "54",
url = "https://hdl.handle.net/21.15107/rcub_technorep_321"
}

Popović, I., Katsikas, L.,& Veličković, J. S.. (2000). The thermal degradation of poly(di-itaconates). in Hemijska industrija
Association of Chemical Engineers of Serbia., 54(11), 494-497.
https://hdl.handle.net/21.15107/rcub_technorep_321

Popović I, Katsikas L, Veličković JS. The thermal degradation of poly(di-itaconates). in Hemijska industrija. 2000;54(11):494-497.
https://hdl.handle.net/21.15107/rcub_technorep_321 .

Popović, Ivanka, Katsikas, Lynne, Veličković, Jovan S., "The thermal degradation of poly(di-itaconates)" in Hemijska industrija, 54, no. 11 (2000):494-497,
https://hdl.handle.net/21.15107/rcub_technorep_321 .

TY  - JOUR
AU  - Tomić, Simonida
AU  - Filipović, Jovanka M.
AU  - Veličković, Jovan S.
AU  - Katsikas, Lynne
AU  - Popović, Ivanka
PY  - 1999
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/227
AB  - The free radical polymerisation kinetics of diethyl- (DEI), dipropyl- (DnPI), dibutyl- (DnBI), and dihexyl itaconate (DHI) in the bulk were studied in the temperature range from 50 to 70 degrees C. The concentration of the initiator, 2,2'-azoisobutyronitrile (AIBN), was varied between 0.02 and 0.085 mol/dm(3). The rate of polymerisation (R-p), degree of polymerisation (DP), overall polymerization rate constant (K), the ratio of the propagation and termination rate constants (k(p)/k(t)(1/2)), as well as the chain transfer constant to monomer (C-M) were determined. The values of R-p, K, and k(p)/k(t)(1/2) of the investigated monomers all increase with increasing size of the alkyl group in the ester substituent, whereas C-M decreases when going from the dimethyl to the dihexyl ester. The values of C-M are larger than the corresponding values for the alkyl esters of methacrylic acid.
PB  - Wiley-VCH Verlag Gmbh, Weinheim
T2  - Macromolecular Chemistry and Physics
T1  - The polymerisation kinetics of lower dialkyl itaconates
EP  - 2427
IS  - 10
SP  - 2421
VL  - 200
DO  - 10.1002/(sici)1521-3935(19991001)200:102421::aid-macp24213.0.co;2-e
ER  - 

@article{
author = "Tomić, Simonida and Filipović, Jovanka M. and Veličković, Jovan S. and Katsikas, Lynne and Popović, Ivanka",
year = "1999",
abstract = "The free radical polymerisation kinetics of diethyl- (DEI), dipropyl- (DnPI), dibutyl- (DnBI), and dihexyl itaconate (DHI) in the bulk were studied in the temperature range from 50 to 70 degrees C. The concentration of the initiator, 2,2'-azoisobutyronitrile (AIBN), was varied between 0.02 and 0.085 mol/dm(3). The rate of polymerisation (R-p), degree of polymerisation (DP), overall polymerization rate constant (K), the ratio of the propagation and termination rate constants (k(p)/k(t)(1/2)), as well as the chain transfer constant to monomer (C-M) were determined. The values of R-p, K, and k(p)/k(t)(1/2) of the investigated monomers all increase with increasing size of the alkyl group in the ester substituent, whereas C-M decreases when going from the dimethyl to the dihexyl ester. The values of C-M are larger than the corresponding values for the alkyl esters of methacrylic acid.",
publisher = "Wiley-VCH Verlag Gmbh, Weinheim",
journal = "Macromolecular Chemistry and Physics",
title = "The polymerisation kinetics of lower dialkyl itaconates",
pages = "2427-2421",
number = "10",
volume = "200",
doi = "10.1002/(sici)1521-3935(19991001)200:102421::aid-macp24213.0.co;2-e"
}

Tomić, S., Filipović, J. M., Veličković, J. S., Katsikas, L.,& Popović, I.. (1999). The polymerisation kinetics of lower dialkyl itaconates. in Macromolecular Chemistry and Physics
Wiley-VCH Verlag Gmbh, Weinheim., 200(10), 2421-2427.
https://doi.org/10.1002/(sici)1521-3935(19991001)200:102421::aid-macp24213.0.co;2-e

Tomić S, Filipović JM, Veličković JS, Katsikas L, Popović I. The polymerisation kinetics of lower dialkyl itaconates. in Macromolecular Chemistry and Physics. 1999;200(10):2421-2427.
doi:10.1002/(sici)1521-3935(19991001)200:102421::aid-macp24213.0.co;2-e .

Tomić, Simonida, Filipović, Jovanka M., Veličković, Jovan S., Katsikas, Lynne, Popović, Ivanka, "The polymerisation kinetics of lower dialkyl itaconates" in Macromolecular Chemistry and Physics, 200, no. 10 (1999):2421-2427,
https://doi.org/10.1002/(sici)1521-3935(19991001)200:102421::aid-macp24213.0.co;2-e . .

TY  - JOUR
AU  - Katsikas, Lynne
AU  - Veličković, Jovan S.
AU  - Weller, Horst
AU  - Popović, Ivanka
PY  - 1997
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/123
AB  - The thermal stability of poly(methyl methacrylate) (PMMA) photopolymerised using colloidal cadmium sulphide as the photoinitiator was studied by thermogravimetry (TG) and differential TG (DTG). The thermal stability of the CdS initiated PMMA was greater than that of conventional radically polymerised PMMA and approached that of anionically prepared PMMA. The DTG curve of the CdS initiated PMMA was a composite of four peaks, three of which correspond to the three peaks observed in the DTG curve of standard radically prepared PMMB. It is suggested that the additional peak arises from a new mode of depolymerisation initiation, that is, from chain end unsaturation introduced into the polymer chain during polymerisation initiation with the colloidal CdS.
PB  - Springer, Dordrecht
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Thermogravimetric characterisation of poly(methyl methacrylate) photopolymerised by colloidal cadmium sulphide
EP  - 323
IS  - 1
SP  - 317
VL  - 49
DO  - 10.1007/BF01987453
ER  - 

@article{
author = "Katsikas, Lynne and Veličković, Jovan S. and Weller, Horst and Popović, Ivanka",
year = "1997",
abstract = "The thermal stability of poly(methyl methacrylate) (PMMA) photopolymerised using colloidal cadmium sulphide as the photoinitiator was studied by thermogravimetry (TG) and differential TG (DTG). The thermal stability of the CdS initiated PMMA was greater than that of conventional radically polymerised PMMA and approached that of anionically prepared PMMA. The DTG curve of the CdS initiated PMMA was a composite of four peaks, three of which correspond to the three peaks observed in the DTG curve of standard radically prepared PMMB. It is suggested that the additional peak arises from a new mode of depolymerisation initiation, that is, from chain end unsaturation introduced into the polymer chain during polymerisation initiation with the colloidal CdS.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Thermogravimetric characterisation of poly(methyl methacrylate) photopolymerised by colloidal cadmium sulphide",
pages = "323-317",
number = "1",
volume = "49",
doi = "10.1007/BF01987453"
}

Katsikas, L., Veličković, J. S., Weller, H.,& Popović, I.. (1997). Thermogravimetric characterisation of poly(methyl methacrylate) photopolymerised by colloidal cadmium sulphide. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 49(1), 317-323.
https://doi.org/10.1007/BF01987453

Katsikas L, Veličković JS, Weller H, Popović I. Thermogravimetric characterisation of poly(methyl methacrylate) photopolymerised by colloidal cadmium sulphide. in Journal of Thermal Analysis and Calorimetry. 1997;49(1):317-323.
doi:10.1007/BF01987453 .

Katsikas, Lynne, Veličković, Jovan S., Weller, Horst, Popović, Ivanka, "Thermogravimetric characterisation of poly(methyl methacrylate) photopolymerised by colloidal cadmium sulphide" in Journal of Thermal Analysis and Calorimetry, 49, no. 1 (1997):317-323,
https://doi.org/10.1007/BF01987453 . .

TY  - JOUR
AU  - Katsikas, Lynne
AU  - Đakov, Tatjana
AU  - Filipović, Jovanka M.
AU  - Veličković, Jovan S.
AU  - Popović, Ivanka
PY  - 1996
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/87
AB  - The oxidative and non-oxidative degradation of poly(di-methoxy-), poly(di-ethoxy-), poly(di-iso-propoxy-) and poly(di-n-butoxyethyl itaconate) were investigated by thermogravimetry. Characteristic degradation temperatures and apparent activation energies of degradation were determined for the non-oxidative degradation of all the investigated polymers. It was not possible to determine these characteristics in the presence of oxygen as the degradation was accompanied by a secondary exothermic reaction. Based on examination of the monomers, it is supposed that the exothermic reaction is a repolymerisation of the monomers released during the earlier stages of polymer degradation.
PB  - John Wiley & Sons Ltd, W Sussex
T2  - Journal of Thermal Analysis
T1  - Poly(dialkoxyethyl itaconates) .2. The thermal degradation of some poly(dialkoxyethyl itaconates)
EP  - 1104
IS  - 4
SP  - 1093
VL  - 47
DO  - 10.1007/BF01979450
ER  - 

@article{
author = "Katsikas, Lynne and Đakov, Tatjana and Filipović, Jovanka M. and Veličković, Jovan S. and Popović, Ivanka",
year = "1996",
abstract = "The oxidative and non-oxidative degradation of poly(di-methoxy-), poly(di-ethoxy-), poly(di-iso-propoxy-) and poly(di-n-butoxyethyl itaconate) were investigated by thermogravimetry. Characteristic degradation temperatures and apparent activation energies of degradation were determined for the non-oxidative degradation of all the investigated polymers. It was not possible to determine these characteristics in the presence of oxygen as the degradation was accompanied by a secondary exothermic reaction. Based on examination of the monomers, it is supposed that the exothermic reaction is a repolymerisation of the monomers released during the earlier stages of polymer degradation.",
publisher = "John Wiley & Sons Ltd, W Sussex",
journal = "Journal of Thermal Analysis",
title = "Poly(dialkoxyethyl itaconates) .2. The thermal degradation of some poly(dialkoxyethyl itaconates)",
pages = "1104-1093",
number = "4",
volume = "47",
doi = "10.1007/BF01979450"
}

Katsikas, L., Đakov, T., Filipović, J. M., Veličković, J. S.,& Popović, I.. (1996). Poly(dialkoxyethyl itaconates) .2. The thermal degradation of some poly(dialkoxyethyl itaconates). in Journal of Thermal Analysis
John Wiley & Sons Ltd, W Sussex., 47(4), 1093-1104.
https://doi.org/10.1007/BF01979450

Katsikas L, Đakov T, Filipović JM, Veličković JS, Popović I. Poly(dialkoxyethyl itaconates) .2. The thermal degradation of some poly(dialkoxyethyl itaconates). in Journal of Thermal Analysis. 1996;47(4):1093-1104.
doi:10.1007/BF01979450 .

Katsikas, Lynne, Đakov, Tatjana, Filipović, Jovanka M., Veličković, Jovan S., Popović, Ivanka, "Poly(dialkoxyethyl itaconates) .2. The thermal degradation of some poly(dialkoxyethyl itaconates)" in Journal of Thermal Analysis, 47, no. 4 (1996):1093-1104,
https://doi.org/10.1007/BF01979450 . .

TY  - JOUR
AU  - Stanojević, N.G.
AU  - Katsikas, Lynne
AU  - Petrović-Đakov, Dušanka
AU  - Diesner, K.
AU  - Filipović, Jovanka M.
AU  - Veličković, Jovan S.
AU  - Popović, Ivanka
PY  - 1995
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/62
AB  - The preparation of dimethoxyethyl itaconate and its polymerisation are described. Some of the properties of the monomer and polymer were determined with special emphasis on the experimental determination of the solubility parameter of the polymer, δp. Possible reasons for the relatively high experimentally determined value of δp 21.6 (J/cm3)1 2 are discussed with comparison to calculated and experimentally determined values for poly(di-butyl itaconate).
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - European Polymer Journal
T1  - Poly(dialkoxyethyl itaconate)s-I. Some properties of dimethoxyethyl itaconate and its polymer
EP  - 545
IS  - 6
SP  - 541
VL  - 31
DO  - 10.1016/0014-3057(94)00213-4
ER  - 

@article{
author = "Stanojević, N.G. and Katsikas, Lynne and Petrović-Đakov, Dušanka and Diesner, K. and Filipović, Jovanka M. and Veličković, Jovan S. and Popović, Ivanka",
year = "1995",
abstract = "The preparation of dimethoxyethyl itaconate and its polymerisation are described. Some of the properties of the monomer and polymer were determined with special emphasis on the experimental determination of the solubility parameter of the polymer, δp. Possible reasons for the relatively high experimentally determined value of δp 21.6 (J/cm3)1 2 are discussed with comparison to calculated and experimentally determined values for poly(di-butyl itaconate).",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "European Polymer Journal",
title = "Poly(dialkoxyethyl itaconate)s-I. Some properties of dimethoxyethyl itaconate and its polymer",
pages = "545-541",
number = "6",
volume = "31",
doi = "10.1016/0014-3057(94)00213-4"
}

Stanojević, N.G., Katsikas, L., Petrović-Đakov, D., Diesner, K., Filipović, J. M., Veličković, J. S.,& Popović, I.. (1995). Poly(dialkoxyethyl itaconate)s-I. Some properties of dimethoxyethyl itaconate and its polymer. in European Polymer Journal
Pergamon-Elsevier Science Ltd, Oxford., 31(6), 541-545.
https://doi.org/10.1016/0014-3057(94)00213-4

Stanojević N, Katsikas L, Petrović-Đakov D, Diesner K, Filipović JM, Veličković JS, Popović I. Poly(dialkoxyethyl itaconate)s-I. Some properties of dimethoxyethyl itaconate and its polymer. in European Polymer Journal. 1995;31(6):541-545.
doi:10.1016/0014-3057(94)00213-4 .

Stanojević, N.G., Katsikas, Lynne, Petrović-Đakov, Dušanka, Diesner, K., Filipović, Jovanka M., Veličković, Jovan S., Popović, Ivanka, "Poly(dialkoxyethyl itaconate)s-I. Some properties of dimethoxyethyl itaconate and its polymer" in European Polymer Journal, 31, no. 6 (1995):541-545,
https://doi.org/10.1016/0014-3057(94)00213-4 . .

TY  - JOUR
AU  - Popović, Ivanka
AU  - Katsikas, Lynne
AU  - Müller, U.
AU  - Veličković, Jovan S.
AU  - Weller, Horst
PY  - 1994
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/58
AB  - A completely new method of initiating the homogeneous radical polymerization of methyl methacrylate in bulk or in solution via the photogeneration of an electron hole pair in colloidal cadmium sulfide is presented. A polymerization mechanism involving an excited cadmium sulfide particle in both the initiation and termination steps is proposed. In the initiation a methyl methacrylate molecule is oxidized by a positive hole photogenerated in a CdS particle, which results in a novel chain‐end structure of the poly(methyl methacrylate) (PMMA). Degradative chain transfer to reduced excited cadmium sulfide particles is responsible for chain termination. Thus, for the first time, a detailed polymerization mechanism in which all states of the polymerization, i.e., initiation, propagation, chain transfer and termination, is presented for the polymerization of vinyl monomers initiated by semiconductors. Thermogravimetry (TG) showed that the newly synthesized PMMA has greatly enhanced thermal stability when compared to normal radically prepared PMMA. In fact, the thermal stability approaches that of anionically prepared PMMA but is experimentally much easier to prepare. This technique enables the homogeneous embedding of CdS particles in a polymer matrix.
PB  - Wiley-VCH Verlag Gmbh, Weinheim
T2  - Macromolecular Chemistry and Physics
T1  - The homogeneous photopolymerization of methyl methacrylate by colloidal cadmium sulfide
EP  - 904
IS  - 3
SP  - 889
VL  - 195
DO  - 10.1002/macp.1994.021950307
ER  - 

@article{
author = "Popović, Ivanka and Katsikas, Lynne and Müller, U. and Veličković, Jovan S. and Weller, Horst",
year = "1994",
abstract = "A completely new method of initiating the homogeneous radical polymerization of methyl methacrylate in bulk or in solution via the photogeneration of an electron hole pair in colloidal cadmium sulfide is presented. A polymerization mechanism involving an excited cadmium sulfide particle in both the initiation and termination steps is proposed. In the initiation a methyl methacrylate molecule is oxidized by a positive hole photogenerated in a CdS particle, which results in a novel chain‐end structure of the poly(methyl methacrylate) (PMMA). Degradative chain transfer to reduced excited cadmium sulfide particles is responsible for chain termination. Thus, for the first time, a detailed polymerization mechanism in which all states of the polymerization, i.e., initiation, propagation, chain transfer and termination, is presented for the polymerization of vinyl monomers initiated by semiconductors. Thermogravimetry (TG) showed that the newly synthesized PMMA has greatly enhanced thermal stability when compared to normal radically prepared PMMA. In fact, the thermal stability approaches that of anionically prepared PMMA but is experimentally much easier to prepare. This technique enables the homogeneous embedding of CdS particles in a polymer matrix.",
publisher = "Wiley-VCH Verlag Gmbh, Weinheim",
journal = "Macromolecular Chemistry and Physics",
title = "The homogeneous photopolymerization of methyl methacrylate by colloidal cadmium sulfide",
pages = "904-889",
number = "3",
volume = "195",
doi = "10.1002/macp.1994.021950307"
}

Popović, I., Katsikas, L., Müller, U., Veličković, J. S.,& Weller, H.. (1994). The homogeneous photopolymerization of methyl methacrylate by colloidal cadmium sulfide. in Macromolecular Chemistry and Physics
Wiley-VCH Verlag Gmbh, Weinheim., 195(3), 889-904.
https://doi.org/10.1002/macp.1994.021950307

Popović I, Katsikas L, Müller U, Veličković JS, Weller H. The homogeneous photopolymerization of methyl methacrylate by colloidal cadmium sulfide. in Macromolecular Chemistry and Physics. 1994;195(3):889-904.
doi:10.1002/macp.1994.021950307 .

Popović, Ivanka, Katsikas, Lynne, Müller, U., Veličković, Jovan S., Weller, Horst, "The homogeneous photopolymerization of methyl methacrylate by colloidal cadmium sulfide" in Macromolecular Chemistry and Physics, 195, no. 3 (1994):889-904,
https://doi.org/10.1002/macp.1994.021950307 . .

TY  - JOUR
AU  - Popović, Ivanka
AU  - Katsikas, Lynne
AU  - Voloschuk, K.A.
AU  - Schrötter, S.
AU  - Veličković, Jovan S.
PY  - 1993
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/48
AB  - The preparation of poly(di-n-hexyl itaconate) (PDHI) in the presence of the chain transfer agent n-dodecyl mercaptan resulted in polymers of increased thermal stability, owing to the suppression of the number of chain terminal double bonds. The polymers were characterised by Fourier transform IR (FTIR) spectroscopy and gel permeation chromatography. The differential thermogravimetry (DTG) curves of all the PDHI samples had two peaks, showing that degradation occurred in two stages. The area of the lower-temperature DTG peak correlated with the number of terminal double bonds.
PB  - Elsevier Sci Ltd, Oxford
T2  - Polymer Degradation and Stability
T1  - The thermal degradation of poly(di-n-hexyl itaconate) prepared in the presence of n-dodecyl mercaptan
EP  - 349
IS  - 3
SP  - 345
VL  - 42
DO  - 10.1016/0141-3910(93)90230-G
ER  - 

@article{
author = "Popović, Ivanka and Katsikas, Lynne and Voloschuk, K.A. and Schrötter, S. and Veličković, Jovan S.",
year = "1993",
abstract = "The preparation of poly(di-n-hexyl itaconate) (PDHI) in the presence of the chain transfer agent n-dodecyl mercaptan resulted in polymers of increased thermal stability, owing to the suppression of the number of chain terminal double bonds. The polymers were characterised by Fourier transform IR (FTIR) spectroscopy and gel permeation chromatography. The differential thermogravimetry (DTG) curves of all the PDHI samples had two peaks, showing that degradation occurred in two stages. The area of the lower-temperature DTG peak correlated with the number of terminal double bonds.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Polymer Degradation and Stability",
title = "The thermal degradation of poly(di-n-hexyl itaconate) prepared in the presence of n-dodecyl mercaptan",
pages = "349-345",
number = "3",
volume = "42",
doi = "10.1016/0141-3910(93)90230-G"
}

Popović, I., Katsikas, L., Voloschuk, K.A., Schrötter, S.,& Veličković, J. S.. (1993). The thermal degradation of poly(di-n-hexyl itaconate) prepared in the presence of n-dodecyl mercaptan. in Polymer Degradation and Stability
Elsevier Sci Ltd, Oxford., 42(3), 345-349.
https://doi.org/10.1016/0141-3910(93)90230-G

Popović I, Katsikas L, Voloschuk K, Schrötter S, Veličković JS. The thermal degradation of poly(di-n-hexyl itaconate) prepared in the presence of n-dodecyl mercaptan. in Polymer Degradation and Stability. 1993;42(3):345-349.
doi:10.1016/0141-3910(93)90230-G .

Popović, Ivanka, Katsikas, Lynne, Voloschuk, K.A., Schrötter, S., Veličković, Jovan S., "The thermal degradation of poly(di-n-hexyl itaconate) prepared in the presence of n-dodecyl mercaptan" in Polymer Degradation and Stability, 42, no. 3 (1993):345-349,
https://doi.org/10.1016/0141-3910(93)90230-G . .

TY  - JOUR
AU  - Zivković, D.
AU  - Katsikas, Lynne
AU  - Veličković, Jovan S.
AU  - Popović, Ivanka
PY  - 1993
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/47
AB  - The non-oxidative thermal degradation of poly (di-2-chloroethyl itaconate) (PD2CEI) was studied by TG and by analysing the thermal products. The major processes occurring during thermal analysis are crosslinking, depolymerisation and carbonisation. The thermal degradation activation energy increased with increasing sample mass loss. The thermal degradation of PD2CEI was compared to that of the structurally similar poly(2-chloroethyl methacrylate) (P2CMA).
PB  - John Wiley & Sons Ltd, W Sussex
T2  - Journal of Thermal Analysis
T1  - The non-oxidative thermal degradation of poly (Di-2-chloroethyl itaconate)
EP  - 772
IS  - 2
SP  - 767
VL  - 40
DO  - 10.1007/BF02546650
ER  - 

@article{
author = "Zivković, D. and Katsikas, Lynne and Veličković, Jovan S. and Popović, Ivanka",
year = "1993",
abstract = "The non-oxidative thermal degradation of poly (di-2-chloroethyl itaconate) (PD2CEI) was studied by TG and by analysing the thermal products. The major processes occurring during thermal analysis are crosslinking, depolymerisation and carbonisation. The thermal degradation activation energy increased with increasing sample mass loss. The thermal degradation of PD2CEI was compared to that of the structurally similar poly(2-chloroethyl methacrylate) (P2CMA).",
publisher = "John Wiley & Sons Ltd, W Sussex",
journal = "Journal of Thermal Analysis",
title = "The non-oxidative thermal degradation of poly (Di-2-chloroethyl itaconate)",
pages = "772-767",
number = "2",
volume = "40",
doi = "10.1007/BF02546650"
}

Zivković, D., Katsikas, L., Veličković, J. S.,& Popović, I.. (1993). The non-oxidative thermal degradation of poly (Di-2-chloroethyl itaconate). in Journal of Thermal Analysis
John Wiley & Sons Ltd, W Sussex., 40(2), 767-772.
https://doi.org/10.1007/BF02546650

Zivković D, Katsikas L, Veličković JS, Popović I. The non-oxidative thermal degradation of poly (Di-2-chloroethyl itaconate). in Journal of Thermal Analysis. 1993;40(2):767-772.
doi:10.1007/BF02546650 .

Zivković, D., Katsikas, Lynne, Veličković, Jovan S., Popović, Ivanka, "The non-oxidative thermal degradation of poly (Di-2-chloroethyl itaconate)" in Journal of Thermal Analysis, 40, no. 2 (1993):767-772,
https://doi.org/10.1007/BF02546650 . .

TY  - JOUR
AU  - Popović, Ivanka
AU  - Katsikas, Lynne
AU  - Weller, Horst
AU  - Schrötter, S.
AU  - Veličković, Jovan S.
PY  - 1993
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/46
AB  - The application of differential thermogravimetric analysis (DTGA) to the study of polymerization mechanisms is illustrated using as examples the radical polymerization of di‐n‐alkyl itaconates and methyl methacrylate (MMA). Five poly(di‐n‐alkyl itaconates) were prepared in bulk, both in the presence and absence of n‐dodecyl mercaptan and in solution using AIBN as initiator. The poly(methyl methacrylate) (PMMA) was photoinitiated using colloidal CdS as a photosensitizer. The thermal properties of the resulting polymers are described in terms of the proposed polymerization mechanisms. The advantages and disadvantages of DTGA for the identification of thermally weak structures are discussed.
PB  - Wiley, Hoboken
T2  - Journal of Applied Polymer Science
T1  - Polymerization studies: The application of differential thermogravimetric analysis
EP  - 1482
IS  - 8
SP  - 1475
VL  - 50
DO  - 10.1002/app.1993.070500819
ER  - 

@article{
author = "Popović, Ivanka and Katsikas, Lynne and Weller, Horst and Schrötter, S. and Veličković, Jovan S.",
year = "1993",
abstract = "The application of differential thermogravimetric analysis (DTGA) to the study of polymerization mechanisms is illustrated using as examples the radical polymerization of di‐n‐alkyl itaconates and methyl methacrylate (MMA). Five poly(di‐n‐alkyl itaconates) were prepared in bulk, both in the presence and absence of n‐dodecyl mercaptan and in solution using AIBN as initiator. The poly(methyl methacrylate) (PMMA) was photoinitiated using colloidal CdS as a photosensitizer. The thermal properties of the resulting polymers are described in terms of the proposed polymerization mechanisms. The advantages and disadvantages of DTGA for the identification of thermally weak structures are discussed.",
publisher = "Wiley, Hoboken",
journal = "Journal of Applied Polymer Science",
title = "Polymerization studies: The application of differential thermogravimetric analysis",
pages = "1482-1475",
number = "8",
volume = "50",
doi = "10.1002/app.1993.070500819"
}

Popović, I., Katsikas, L., Weller, H., Schrötter, S.,& Veličković, J. S.. (1993). Polymerization studies: The application of differential thermogravimetric analysis. in Journal of Applied Polymer Science
Wiley, Hoboken., 50(8), 1475-1482.
https://doi.org/10.1002/app.1993.070500819

Popović I, Katsikas L, Weller H, Schrötter S, Veličković JS. Polymerization studies: The application of differential thermogravimetric analysis. in Journal of Applied Polymer Science. 1993;50(8):1475-1482.
doi:10.1002/app.1993.070500819 .

Popović, Ivanka, Katsikas, Lynne, Weller, Horst, Schrötter, S., Veličković, Jovan S., "Polymerization studies: The application of differential thermogravimetric analysis" in Journal of Applied Polymer Science, 50, no. 8 (1993):1475-1482,
https://doi.org/10.1002/app.1993.070500819 . .

TY  - JOUR
AU  - Katsikas, Lynne
AU  - Jeremić, Katarina B.
AU  - Jovanović, S.
AU  - Veličković, Jovan S.
AU  - Popović, Ivanka
PY  - 1993
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/50
AB  - The effect of molar mass and, in the case of dextran, of the degree of branching on the thermal degradation kinetics of dextran and pullulan was studied in the presence and absence of oxygen. Although the initial mass loss of the dextran samples occurred at higher temperatures than that of the pullulan samples, the overall thermal degradation activation energies were lower for dextran than for pullulan. In the case of dextran the thermal stability was found to decrease with molar mass and degree of branching. The molar mass of pullulan, in the range of 104 to 105 g/mol, appeared to have no significant influence on the thermal characteristics of the samples.
PB  - John Wiley & Sons Ltd, W Sussex
T2  - Journal of Thermal Analysis
T1  - The thermal degradation kinetics of dextran and pullulan
EP  - 517
IS  - 2
SP  - 511
VL  - 40
DO  - 10.1007/BF02546620
ER  - 

@article{
author = "Katsikas, Lynne and Jeremić, Katarina B. and Jovanović, S. and Veličković, Jovan S. and Popović, Ivanka",
year = "1993",
abstract = "The effect of molar mass and, in the case of dextran, of the degree of branching on the thermal degradation kinetics of dextran and pullulan was studied in the presence and absence of oxygen. Although the initial mass loss of the dextran samples occurred at higher temperatures than that of the pullulan samples, the overall thermal degradation activation energies were lower for dextran than for pullulan. In the case of dextran the thermal stability was found to decrease with molar mass and degree of branching. The molar mass of pullulan, in the range of 104 to 105 g/mol, appeared to have no significant influence on the thermal characteristics of the samples.",
publisher = "John Wiley & Sons Ltd, W Sussex",
journal = "Journal of Thermal Analysis",
title = "The thermal degradation kinetics of dextran and pullulan",
pages = "517-511",
number = "2",
volume = "40",
doi = "10.1007/BF02546620"
}

Katsikas, L., Jeremić, K. B., Jovanović, S., Veličković, J. S.,& Popović, I.. (1993). The thermal degradation kinetics of dextran and pullulan. in Journal of Thermal Analysis
John Wiley & Sons Ltd, W Sussex., 40(2), 511-517.
https://doi.org/10.1007/BF02546620

Katsikas L, Jeremić KB, Jovanović S, Veličković JS, Popović I. The thermal degradation kinetics of dextran and pullulan. in Journal of Thermal Analysis. 1993;40(2):511-517.
doi:10.1007/BF02546620 .

Katsikas, Lynne, Jeremić, Katarina B., Jovanović, S., Veličković, Jovan S., Popović, Ivanka, "The thermal degradation kinetics of dextran and pullulan" in Journal of Thermal Analysis, 40, no. 2 (1993):511-517,
https://doi.org/10.1007/BF02546620 . .

TY  - JOUR
AU  - Popović, Ivanka
AU  - Katsikas, Lynne
AU  - Prazić, A.
AU  - Schrötter, S.
AU  - Weller, Horst
AU  - Veličković, Jovan S.
PY  - 1993
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/49
AB  - The application of derivativ thermogravimetry (DTG) to investigate polymerisation mechanisms is illustrated using the radical polymerisation of di-n-alkyl itaconates as well as the photoinitiated polymerisation of methyl methacrylate by colloidal CdS. The thermal properties of the resulting polymers are described. The advantages and disadvantages of DTG are discussed.
PB  - John Wiley & Sons Ltd, W Sussex
T2  - Journal of Thermal Analysis
T1  - The applicability of DTG to polymerisation studies
EP  - 765
IS  - 2
SP  - 757
VL  - 40
DO  - 10.1007/BF02546649
ER  - 

@article{
author = "Popović, Ivanka and Katsikas, Lynne and Prazić, A. and Schrötter, S. and Weller, Horst and Veličković, Jovan S.",
year = "1993",
abstract = "The application of derivativ thermogravimetry (DTG) to investigate polymerisation mechanisms is illustrated using the radical polymerisation of di-n-alkyl itaconates as well as the photoinitiated polymerisation of methyl methacrylate by colloidal CdS. The thermal properties of the resulting polymers are described. The advantages and disadvantages of DTG are discussed.",
publisher = "John Wiley & Sons Ltd, W Sussex",
journal = "Journal of Thermal Analysis",
title = "The applicability of DTG to polymerisation studies",
pages = "765-757",
number = "2",
volume = "40",
doi = "10.1007/BF02546649"
}

Popović, I., Katsikas, L., Prazić, A., Schrötter, S., Weller, H.,& Veličković, J. S.. (1993). The applicability of DTG to polymerisation studies. in Journal of Thermal Analysis
John Wiley & Sons Ltd, W Sussex., 40(2), 757-765.
https://doi.org/10.1007/BF02546649

Popović I, Katsikas L, Prazić A, Schrötter S, Weller H, Veličković JS. The applicability of DTG to polymerisation studies. in Journal of Thermal Analysis. 1993;40(2):757-765.
doi:10.1007/BF02546649 .

Popović, Ivanka, Katsikas, Lynne, Prazić, A., Schrötter, S., Weller, Horst, Veličković, Jovan S., "The applicability of DTG to polymerisation studies" in Journal of Thermal Analysis, 40, no. 2 (1993):757-765,
https://doi.org/10.1007/BF02546649 . .

TY  - JOUR
AU  - Popović, Ivanka
AU  - Katsikas, Lynne
AU  - Voloschuk, K.A.
AU  - Veličković, Jovan S.
AU  - Schnabel, W.
PY  - 1992
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/40
AB  - The thermal degradation kinetics of poly(2-mono-, 2,2-di- and 2,2,2-trichlorethyl methacrylate) and of the non-chlorinated poly(ethyl methacrylate) were studied by TG in the absence and presence of oxygen. The overall thermal degradation energy, determined by the Flynn-Wall method, increases with increasing chlorine content of the polymer when the degradation is performed in the absence of oxygen, while the trend is reversed in the presence of oxygen. Competition between the two major non-oxidative thermolysis reactions, depolymerization and crosslinking, could be monitored by DTG. Generally, the thermal stability of the investigated polymers is reduced by oxygen.
PB  - John Wiley & Sons Ltd, W Sussex
T2  - Journal of Thermal Analysis
T1  - The thermal degradation kinetics of poly(chlorethylmethacrylates)
EP  - 275
IS  - 3
SP  - 267
VL  - 38
DO  - 10.1007/BF01915491
ER  - 

@article{
author = "Popović, Ivanka and Katsikas, Lynne and Voloschuk, K.A. and Veličković, Jovan S. and Schnabel, W.",
year = "1992",
abstract = "The thermal degradation kinetics of poly(2-mono-, 2,2-di- and 2,2,2-trichlorethyl methacrylate) and of the non-chlorinated poly(ethyl methacrylate) were studied by TG in the absence and presence of oxygen. The overall thermal degradation energy, determined by the Flynn-Wall method, increases with increasing chlorine content of the polymer when the degradation is performed in the absence of oxygen, while the trend is reversed in the presence of oxygen. Competition between the two major non-oxidative thermolysis reactions, depolymerization and crosslinking, could be monitored by DTG. Generally, the thermal stability of the investigated polymers is reduced by oxygen.",
publisher = "John Wiley & Sons Ltd, W Sussex",
journal = "Journal of Thermal Analysis",
title = "The thermal degradation kinetics of poly(chlorethylmethacrylates)",
pages = "275-267",
number = "3",
volume = "38",
doi = "10.1007/BF01915491"
}

Popović, I., Katsikas, L., Voloschuk, K.A., Veličković, J. S.,& Schnabel, W.. (1992). The thermal degradation kinetics of poly(chlorethylmethacrylates). in Journal of Thermal Analysis
John Wiley & Sons Ltd, W Sussex., 38(3), 267-275.
https://doi.org/10.1007/BF01915491

Popović I, Katsikas L, Voloschuk K, Veličković JS, Schnabel W. The thermal degradation kinetics of poly(chlorethylmethacrylates). in Journal of Thermal Analysis. 1992;38(3):267-275.
doi:10.1007/BF01915491 .

Popović, Ivanka, Katsikas, Lynne, Voloschuk, K.A., Veličković, Jovan S., Schnabel, W., "The thermal degradation kinetics of poly(chlorethylmethacrylates)" in Journal of Thermal Analysis, 38, no. 3 (1992):267-275,
https://doi.org/10.1007/BF01915491 . .

TY  - JOUR
AU  - Popović, Ivanka
AU  - Galogaža, V.
AU  - Katsikas, Lynne
AU  - Veličković, Jovan S.
PY  - 1991
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/28
AB  - The non-oxidative thermal stability of poly(di-aryl itaconates) was established by thermogravimetric analysis. The polymers investigated were poly(diphenyl itaconate) (PDPhI), poly(di-ortho-, meta- and para-tolyl itaconates) (PDoTI, PDmTI, PDpTI) and poly(dibenzyl itaconate) (PDBzI). The shapes of the DTG curves indicated that at least two reactions were involved in the degradation mechanisms. Carbonaceous residues were registered in all polymers. Preliminary thermal degradation experiments showed that the polymers decomposed mainly by depolymerisation with side chain scission registered in the cases of PDoTI and PDBzI. All polymers except PDBzI crosslinked slightly at lower degradation temperatures.
PB  - Springer, New York
T2  - Polymer Bulletin
T1  - The thermal stability of some poly(di-aryl itaconates)
EP  - 114
IS  - 1
SP  - 107
VL  - 25
DO  - 10.1007/BF00338907
ER  - 

@article{
author = "Popović, Ivanka and Galogaža, V. and Katsikas, Lynne and Veličković, Jovan S.",
year = "1991",
abstract = "The non-oxidative thermal stability of poly(di-aryl itaconates) was established by thermogravimetric analysis. The polymers investigated were poly(diphenyl itaconate) (PDPhI), poly(di-ortho-, meta- and para-tolyl itaconates) (PDoTI, PDmTI, PDpTI) and poly(dibenzyl itaconate) (PDBzI). The shapes of the DTG curves indicated that at least two reactions were involved in the degradation mechanisms. Carbonaceous residues were registered in all polymers. Preliminary thermal degradation experiments showed that the polymers decomposed mainly by depolymerisation with side chain scission registered in the cases of PDoTI and PDBzI. All polymers except PDBzI crosslinked slightly at lower degradation temperatures.",
publisher = "Springer, New York",
journal = "Polymer Bulletin",
title = "The thermal stability of some poly(di-aryl itaconates)",
pages = "114-107",
number = "1",
volume = "25",
doi = "10.1007/BF00338907"
}

Popović, I., Galogaža, V., Katsikas, L.,& Veličković, J. S.. (1991). The thermal stability of some poly(di-aryl itaconates). in Polymer Bulletin
Springer, New York., 25(1), 107-114.
https://doi.org/10.1007/BF00338907

Popović I, Galogaža V, Katsikas L, Veličković JS. The thermal stability of some poly(di-aryl itaconates). in Polymer Bulletin. 1991;25(1):107-114.
doi:10.1007/BF00338907 .

Popović, Ivanka, Galogaža, V., Katsikas, Lynne, Veličković, Jovan S., "The thermal stability of some poly(di-aryl itaconates)" in Polymer Bulletin, 25, no. 1 (1991):107-114,
https://doi.org/10.1007/BF00338907 . .

TY  - JOUR
AU  - Popović, Ivanka
AU  - Song, J.
AU  - Fischer, Ch.-H.
AU  - Katsikas, Lynne
AU  - Höhne, G.
AU  - Veličković, Jovan S.
AU  - Schnabel, W.
PY  - 1991
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/31
AB  - The thermal degradation of poly(2,2,2-trichloroethyl methacrylate). PTCMA, in the absence and presence of O2 was studied and compared with that of poly(ethyl methacrylate), PEMA. In the absence of O2 the two polymers behaved quite differently. Apart from unzipping, PTCMA became partially insoluble due to intermolecular crosslinking at T < 240°C in contrast to PEMA which remained soluble. At T > 240°C both polymers degraded effectively by depolymerization. O2 prevented crosslinking of PTCMA and retarded unzipping (shift of onset to higher temperature). It was inferred from product analysis that at T < 240°C the thermolysis of PTCMA is initiated by decomposition of pendant groups. Primary bond cleavage at various positions in the side groups, {A figure is presented} results in the formation of free radicals. In the presence of O2, hydrogen abstraction from CH2 groups in the polymer backbone generates carbon centered radicals {A figure is presented} which can be converted into oxyl radicals {A figure is presented}. The latter can give rise to main-chain scission. Apart from the monomer, the main volatile compounds formed in the presence of O2 are: 2,2,2-trichloroethyl pyruvate, CH3COCOOCH2CCl3 and 2-methyl-oxirane carbonic acid 2,2,2-trichloroethyl ester, {A figure is presented} Mechanisms concerning the initiation of thermolysis of PTCMA are proposed on the basis of the various thermolysis products.
PB  - Elsevier Sci Ltd, Oxford
T2  - Polymer Degradation and Stability
T1  - On the thermolysis of poly(chloroalkyl methacrylates) and poly(chloroalkyl acrylates): Part 1-Poly(2,2,2-trichloroethyl methacrylate)
EP  - 283
IS  - 3
SP  - 265
VL  - 32
DO  - 10.1016/0141-3910(91)90001-8
ER  - 

@article{
author = "Popović, Ivanka and Song, J. and Fischer, Ch.-H. and Katsikas, Lynne and Höhne, G. and Veličković, Jovan S. and Schnabel, W.",
year = "1991",
abstract = "The thermal degradation of poly(2,2,2-trichloroethyl methacrylate). PTCMA, in the absence and presence of O2 was studied and compared with that of poly(ethyl methacrylate), PEMA. In the absence of O2 the two polymers behaved quite differently. Apart from unzipping, PTCMA became partially insoluble due to intermolecular crosslinking at T < 240°C in contrast to PEMA which remained soluble. At T > 240°C both polymers degraded effectively by depolymerization. O2 prevented crosslinking of PTCMA and retarded unzipping (shift of onset to higher temperature). It was inferred from product analysis that at T < 240°C the thermolysis of PTCMA is initiated by decomposition of pendant groups. Primary bond cleavage at various positions in the side groups, {A figure is presented} results in the formation of free radicals. In the presence of O2, hydrogen abstraction from CH2 groups in the polymer backbone generates carbon centered radicals {A figure is presented} which can be converted into oxyl radicals {A figure is presented}. The latter can give rise to main-chain scission. Apart from the monomer, the main volatile compounds formed in the presence of O2 are: 2,2,2-trichloroethyl pyruvate, CH3COCOOCH2CCl3 and 2-methyl-oxirane carbonic acid 2,2,2-trichloroethyl ester, {A figure is presented} Mechanisms concerning the initiation of thermolysis of PTCMA are proposed on the basis of the various thermolysis products.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Polymer Degradation and Stability",
title = "On the thermolysis of poly(chloroalkyl methacrylates) and poly(chloroalkyl acrylates): Part 1-Poly(2,2,2-trichloroethyl methacrylate)",
pages = "283-265",
number = "3",
volume = "32",
doi = "10.1016/0141-3910(91)90001-8"
}

Popović, I., Song, J., Fischer, Ch.-H., Katsikas, L., Höhne, G., Veličković, J. S.,& Schnabel, W.. (1991). On the thermolysis of poly(chloroalkyl methacrylates) and poly(chloroalkyl acrylates): Part 1-Poly(2,2,2-trichloroethyl methacrylate). in Polymer Degradation and Stability
Elsevier Sci Ltd, Oxford., 32(3), 265-283.
https://doi.org/10.1016/0141-3910(91)90001-8

Popović I, Song J, Fischer C, Katsikas L, Höhne G, Veličković JS, Schnabel W. On the thermolysis of poly(chloroalkyl methacrylates) and poly(chloroalkyl acrylates): Part 1-Poly(2,2,2-trichloroethyl methacrylate). in Polymer Degradation and Stability. 1991;32(3):265-283.
doi:10.1016/0141-3910(91)90001-8 .

Popović, Ivanka, Song, J., Fischer, Ch.-H., Katsikas, Lynne, Höhne, G., Veličković, Jovan S., Schnabel, W., "On the thermolysis of poly(chloroalkyl methacrylates) and poly(chloroalkyl acrylates): Part 1-Poly(2,2,2-trichloroethyl methacrylate)" in Polymer Degradation and Stability, 32, no. 3 (1991):265-283,
https://doi.org/10.1016/0141-3910(91)90001-8 . .