Time-temperature superposition in viscous liquids

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    Abstract

    This paper reports on aging of the silicone oil MS704 for sudden changes of temperature from 210.5 to 209.0 K and from 207.5 to 209.0 K studied by continuously monitoring the instantaneous shear modulus G [infinity] . The results are interpreted within the Tool-Narayanaswamy formalism with a reduced time definition based on a recently proposed expression for the relaxation time, where G [infinity] reflects the fictive temperature. All parameters entering the reduced time were determined from independent measurements of the frequency-dependent shear modulus of the equilibrium liquid.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume86
    Issue number5
    Pages (from-to)1271-1274
    ISSN0031-9007
    Publication statusPublished - 2001

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