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Temperature-independent relaxation in a lamellar block copolymer

Naturevolume 257pages123125 (1975) | Download Citation



IT has long been assumed that all processes giving rise to stress relaxation in high polymers are very dependent on temperature. The peak in mechanical or dielectric loss factor (tanδ) can be used to characterise the most probable relaxation time of a high polymer solid. The temperature locus of this relaxation time is described by a simple Arrhenius-type law for low temperature, glassy state processes1 and by the Williams, Landel and Ferry expression2 for ‘Tg’ processes. We now report results for an elastomer exhibiting a unique relaxation process which remains essentially constant in position and magnitude over a temperature range of more than 100 K.

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  1. Department of Chemistry, University of Technology, Loughborough, Leicestershire, LE11 3TU, UK

    • R. E. WETTON
    •  & W. H. TUMINELLO


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