✦ LIBER ✦

Crystal structure and crystallinity of poly(aryl ether biphenyl ether ketone ketone)

✍ Scribed by Tianxi Liu; Zhishen Mo; Shanger Wang; Hongfang Zhang; Hui Na; Zhongwen Wu

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 365 KB
Volume: 18
Category: Article
ISSN: 1022-1336
DOI: 10.1002/marc.1997.030180104

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

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.

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