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Poly(ethylene terephthalate), modified with bisphenol S units, with increased glass transition temperature
Author(s) -
Lotti Nadia,
Colonna Martino,
Fiorini Maurizio,
Finelli Lara,
Berti Corrado
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.38165
Subject(s) - glass transition , bisphenol a , polyester , bisphenol , materials science , thermal stability , polymer chemistry , amorphous solid , copolymer , ethylene , crystallization , poly ethylene , chemical engineering , atmospheric temperature range , polymer , composite material , organic chemistry , chemistry , catalysis , epoxy , thermodynamics , physics , engineering
Novel copolyesters have been prepared by melt mixing poly(ethylene terephthalate) (PET) with an ethoxylated bisphenol S, with the aim to prepare new polyesters with increased T g , to be used in a wider range of temperatures with respect to neat PET. No side reactions occur during the synthesis of the samples, as proved by NMR analysis. The insertion of the bisphenol S (sulfonyldiphenol) groups does not significantly alter the thermal stability of PET. The thermal analysis showed that T m and crystallization rate of the copolymers decreased with incasing co‐unit content. The T g of the copolyesters can be increased by bisphenol S insertion, up to 40°C higher with respect to neat PET, that allows the use of amorphous PET in a wider range of applications. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013