Enthalpic relaxation in semi-crystalline PEEK

Jonathan Atkinson, Michael Jenkins, James Hay

Research output: Contribution to journalArticle


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.
Original languageEnglish
Pages (from-to)731-735
Number of pages5
Issue number3
Publication statusPublished - 1 Feb 2002


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


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