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6635123 
Journal Article 
Radical copolymerization of fumaric acid with styrene in DMF solution 
Switala-Zeliazkow, M; , 
1999 
Yes 
European Polymer Journal
ISSN: 0014-3057 
PERGAMON-ELSEVIER SCIENCE LTD 
OXFORD 
1591-1597 
WOS:000081020400003 
The radical copolymerization of fumaric acid (FA) with styrene (St) was carried out in DMF solution at 70 degrees C. The UV spectroscopy excludes the presence of a charge-transfer complex between FA and St in the copolymerization system. The copolymerization of FA with St was described by using the terminal and penultimate models. The Joshi-Joshi, Fineman-Ross, Kelen-Tudos and Ezrielev-Brokhina-Roskin methods were used to determine the reactivity ratios in terminal model. The reactivity ratios in penultimate model were found by iterative procedure without constraint and with constraint r(1) greater than or equal to r'(1) and r(2) greater than or equal to r'(2) Both the classic model as well as the penultimate model were a relatively adequate description of the copolymerization mechanism. From the calculated reactivity ratios, Q and e values were calculated, as well as the sequence distribution in copolymers. The copolymers were analysed by FTIR,H-1 NMR and TG methods. (C) 1999 Elsevier Science Ltd. All rights reserved.