Abstract
The results of dynamic light scattering, ultrasonic and dielectric measurements of a bulk poly(methylphenyl siloxane) with M W=1800 g/mol over a broad temperature and frequency range are reported. The temperature dependence of the reorientational relaxation times exhibit very fragile behaviour and indicates the decoupling of density and orientational relaxation times at temperatures higher than 1.2T g. This suggests a major contribution of volume structural rearrangements to longitudinal relaxation processes for this sample in the ultrasonic and hypersonic frequency region.
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© 1993 Dr. Dietrich Steinkopff Verlag GmbH & Co. KG
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Stieber, F., Floudas, G., Alig, I., Fytas, G. (1993). Structural relaxation in a low molecular weight poly(methylphenyl siloxane). In: Ewen, B., Fischer, E.W., Fytas, G. (eds) Application of Scattering Methods to the Dynamics of Polymer Systems. Progress in Colloid & Polymer Science, vol 91. Steinkopff. https://doi.org/10.1007/BFb0116485
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DOI: https://doi.org/10.1007/BFb0116485
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Online ISBN: 978-3-7985-1678-6
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