Random copolycondensation of isophthalic acid/terephthalic acid with bisphenols by tosyl chloride/dimethylformamide/pyridine in terms of the monomer reactivity ratios of bisphenols

Autor: Naoko Mizutani, Fukuji Higashi
Rok vydání: 2003
Předmět:
Zdroj: Journal of Polymer Science Part A: Polymer Chemistry. 41:3908-3915
ISSN: 1099-0518
0887-624X
DOI: 10.1002/pola.10984
Popis: The random copolycondensation of isophthalic acid/terephthalic acid with various combinations of bisphenols (M1 and M2) with a tosyl chloride/dimethylformamide/pyridine condensing agent was carried out to investigate the effects of the monomer reactivity ratios, r1′ and r2′, on the reaction, like r1 and r2 in radical copolymerization. The ratios were calculated from the probabilities of finding an M2 unit next to an M1 unit and of finding an M1 unit next to an M2 unit, which were determined by an NMR analysis of the resultant copolymers. They were discussed with respect to the inherent viscosities (molecular weights) of the resultant copolymers. There was a fairly good relationship between r1′ and r2′ and the inherent viscosity values of the copolymers, indicating that copolycondensation could be facilitated by a combination of bisphenols; the lowering of r1′ and r2′ was indicative of random distributions in the copolymers. © 2003 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 41: 3908–3915, 2003
Databáze: OpenAIRE
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