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Crystal structure and crystallinity of poly(aryl ether biphenyl ether ketone ketone)
Author(s) -
Liu Tianxi,
Mo Zhishen,
Wang Shanger,
Zhang Hongfang,
Na Hui,
Wu Zhongwen
Publication year - 1997
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1997.030180104
Subject(s) - orthorhombic crystal system , crystallinity , ether , ketone , crystallization , crystallite , materials science , aryl , biphenyl , polymer chemistry , crystal structure , crystallography , chemistry , organic chemistry , alkyl
The crystal structure of poly(aryl ether biphenyl ether ketone ketone) (PEDEKK) was determined to comprise a two‐chain orthorhombic unit cell with dimensions a = 0.778 nm, b = 0.606 nm and c = 2.375 nm by using wide‐angle X‐ray diffraction (WAXD). According to the orthorhombic system, the 12 reflections of this polymer were indexed. The crystallite size increases with increasing the crystallization temperature. The results of the degree of crystallinity ( W c,x ) calculated from WAXD were compatible with those from density ( W c,d ) and calorimetry ( W c,h ) measurements.