Abstract
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.
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© 1993 Dr. Dietrich Steinkopff Verlag GmbH & Co. KG
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Lohfink, M., Sillescu, H. (1993). Tracer diffusion in polymer and organic liquids close to the glass transition studied by forced rayleigh scattering. 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/BFb0116450
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DOI: https://doi.org/10.1007/BFb0116450
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