The parameterS0 which is characteristic of molten alkali halides and liquids has also been shown to be characteristic of a wide variety of polymers. Calculated data using the volume expansivity of the polymer establish the temperature invariance and constancy of theS0-parameter which retains, on an average, a constant value of 1.11 for polymers. Further understanding of the significance of fractional free volume andS0-parameter in describing various thermoacoustic properties and the anharmonic behaviour in polymers, has been developed.
Volume 94, 2020
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