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Crystallization behavior and crystal structure of poly(ethylene‐ co ‐trimethylene terephthalate)s
Author(s) -
Chen Xudong,
Yang Kun,
Hou Gong,
Chen Yujun,
Dong Yeping,
Liao Zhengfu
Publication year - 2007
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.24993
Subject(s) - crystallization , copolymer , materials science , ethylene , dimethyl terephthalate , polymer chemistry , condensation polymer , ethylene glycol , amorphous solid , crystal (programming language) , crystal structure , polymer , chemical engineering , polyester , crystallography , organic chemistry , catalysis , chemistry , composite material , programming language , computer science , engineering
A series of random copolymers were synthesized by the bulk polycondensation of dimethyl terephthalate with ethylene glycol (EG) and propane‐1,3‐diol (PDO) in various compositions. Their composition and thermal properties were investigated. The copolymers with 57.7 mol % or more PDO or 14.4 mol % or less PDO were crystallizable, but those with 36–46.2 mol % PDO were amorphous. The nonisothermal crystallization behavior was investigated with varying cooling rates by DSC. Poly(ethylene terephthalate) (PET) and poly(trimethylene terephthalate) (PTT) homopolymers have relatively lower activation energy than their copolymers. PET‐rich copolymers (EG > 85.9%) exhibited PET crystal structure, and exhibited no PTT crystal structure; and PTT‐rich copolymers (PDO > 41.7%) exhibited PTT crystal structure, and exhibited no PET crystal structure. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007