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Proton NMR characterization of chain structure in butylene terephthalate-ϵ-caprolactone copolyesters

✍ Scribed by Xiaomin Cheng; Xiaolie Luo; Zhibo Li; Dezhu Ma

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 239 KB
Volume: 37
Category: Article
ISSN: 0887-624X
DOI: 10.1002/(sici)1099-0518(19991015)37:20<3770::aid-pola5>3.0.co;2-7

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✦ Synopsis

A series of butylene terephthalate-⑀-caprolactone copolyesters (BCL) with different hard-segment content were synthesized and their chain structures were carefully investigated by high resolution 1 H-NMR spectroscopy. The analysis from 1 H-NMR spectra of samples reveals that BCL chain chemical and sequence structure is specific and complicated because of the unavoidable transesterification between BT and CL segments during synthesis process and so BCL copolyesters are segmented copolyesters with certain random property as confirmed by DSC measurements.

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