Tracer diffusion in polymer and organic liquids close to the glass transition studied by forced rayleigh scattering

  • M. Lohfink
  • H. Sillescu
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 91)


Translational diffusion coefficients D of photochronic dye molecules have been measured by forced Rayleigh scattering in polymer diluent systems at compositions from pure polymer to pure diluent. D could be measured down to below the glass transition temperature T g. In the pure diluent, D(T g) was found typically about two decades below that in the pure polymer but still far above the Stokes-Einstein prediction extrapolated from high temperatures. Some experimental results are in contrast with predictions from free-volume theory.

Key words

Diffusion polymers plasticisers glass transition 


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Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1993

Authors and Affiliations

  • M. Lohfink
    • 1
  • H. Sillescu
    • 1
  1. 1.Institut für Physikalische Chemie der Johannes Gutenberg-Universität MainzFRG

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