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Enthalpy relaxation in poly(ethylene terephthalate) and related polyesters

McGonigle, E.A. and Jenkins, S.D. and Liggat, J.J. and Pethrick, R.A. (2000) Enthalpy relaxation in poly(ethylene terephthalate) and related polyesters. Polymer International, 49 (11). pp. 1458-1463. ISSN 0959-8103

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Abstract

Enthalpic relaxation data are presented on poly(ethylene terephthalate), poly(ethylene naphthalate) and their copolymers. Analysis of these data allows the determination of the amount of energy absorbed at the glass transition, Qt, and the location of the enthalpic recovery peak, Tmax, as a function of the time of ageing of the samples. Ageing measurements were carried out for periods of up to 2016 h and at temperatures between 40 °C and 110 °C, depending upon the chemical composition of the system being investigated. The enthalpic relaxation rates are influenced by the chemical structure and reflect the effects of local order pinning the chains and influencing the rate of enthalpic recovery.

Item type: Article
ID code: 17465
Keywords: poly(ethylene terephthalate), poly(ethylene naphthalate), copolymers, physical ageing, enthalpy relaxation, DSC, relaxation pinning, Chemistry, Polymers and Plastics
Subjects: Science > Chemistry
Department: Faculty of Science > Pure and Applied Chemistry
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 22 Apr 2010 15:04
    Last modified: 05 Sep 2014 01:12
    URI: http://strathprints.strath.ac.uk/id/eprint/17465

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