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Relationship between molecular structure and thermal properties of poly(aryl ether ketone)s

✍ Scribed by Mitsuhiro Shibata; Ryutoku Yosomiya; Junzuo Wang; Yubin Zheng; Wanjin Zhang; Zhongwen Wu

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
294 KB
Volume
18
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Five kinds of poly(aryl ether ketone)s (PAEKs) having para‐substituted linear molecular chains were synthesized via nucleophilic substitution reaction of the corresponding difluoro‐ and dihydroxy‐compounds. The glass transition temperature and melting temperature of the PAEKs measured through differential scanning calorimetry in addition to those of other PAEKs reported are approximately proportional to the logarithm of the ratio of the mole fractions of ketone and ether groups in the repeating unit of the PEAKs. On the other hand, this ratio does not affect the crystal structure of the PAEKs.

πŸ“œ SIMILAR VOLUMES

Thermal properties and crystallization b
Thermal properties and crystallization behavior of poly(ether ether ketone ketone)/poly(ether biphenyl ether ketone ketone) copolymers
✍ Mitsuhiro Shibata; Ryutoku Yosomiya; Zhenhua Jiang; Zhijie Fang; Zhongwen Wu πŸ“‚ Article πŸ“… 1996 πŸ› John Wiley and Sons 🌐 English βš– 321 KB

## Abstract Thermal properties of poly(ether ether ketone ketone) (PEEKK)/poly(ether biphenyl ether ketone ketone) (PEDEKK) copolymers were investigated by means of differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The glass transition temperature (__T__~g~) increases fr

Crystal structure and crystallinity of p
Crystal structure and crystallinity of poly(aryl ether biphenyl ether ketone ketone)
✍ Tianxi Liu; Zhishen Mo; Shanger Wang; Hongfang Zhang; Hui Na; Zhongwen Wu πŸ“‚ Article πŸ“… 1997 πŸ› John Wiley and Sons 🌐 English βš– 365 KB

## 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 orthorhomb