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Crystallographic Equivalence of Ether and Ketone Groups in Poly(aryl ether ketone)s
Author(s) -
Qiu Zhaobin,
Mo Zhishen,
Zhou Hongwei,
Zhang Hongfang,
Wu Zhongwen
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20010601)202:9<1862::aid-macp1862>3.0.co;2-m
Subject(s) - ketone , ether , aryl , polymer , equivalence (formal languages) , polymer chemistry , chemistry , diphenyl ether , crystallography , organic chemistry , mathematics , pure mathematics , alkyl
Crystallographic equivalence of ether and ketone in all para ‐substituted PAEKs crystallized in Form I was discussed in this paper. In a word, crystallographic equivalence between ether and ketone groups is tenable when the polymer contains only phenyl rings in the repeat unit. If the polymer contains a diphenyl group in the repeat unit, two cases should be distinguished. In the case of PEDEKK and PEEKDK, crystallographic equivalence between ether and ketone linkages is untenable. However, in the case of PEDK and PEDEKDK, crystallographic equivalence between ether and ketone linkages is still tenable.