Enthalpic relaxation in semi-crystalline PEEK

被引：48

作者：

Atkinson, JR ^{[1
]}

Hay, JN ^{[1
]}

Jenkins, MJ ^{[1
]}

机构：

[1] Univ Birmingham, Birmingham B15 2TT, W Midlands, England

来源：

POLYMER | 2002年 / 43卷 / 03期

关键词：

enthalpic relaxation; amorphous poly(ether ether ketone); semi-crystalline poly(ether ether ketone);

D O I：

10.1016/S0032-3861(01)00668-1

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The effect of crystallisation on the glass transition temperature and enthalpic relaxation in poly(ether ether ketone) (PEEK) has been investigated. The increase in glass transition temperature and the activation enthalpy of ageing is explained in terms of the amorphous phase being constrained by the crystallites. The extent of enthalpic relaxation with time has been analysed in terms of the Cowie-Ferguson model and the beta value was found to be dependent on both temperature and the crystalline morphology, changes in the co-operativity of the relaxations are used to explain this observation. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：731 / 735

页数：5

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