| Issue |
Korean Journal of Chemical Engineering,
Vol.17, No.3, 310-317, 2000
Vol.17, No.3, 310-317, 2000
Diffusion in Polymers below the Glass Transition Temperature : Comparison of Two Approaches Based on Free Volume Concepts
Theories based on free-volume concepts have been developed to characterize the self and mutual diffusion coefficients of low molecular weight penetrants in rubbery and glassy polymer-solvent systems. These theories are applicable over a wide range of temperatures and concentrations. In this paper, two alternative free-volume based approaches used to evaluate the solvent self-diffusion in glassy polymer-solvent systems are compared in terms of their differences and applicability.
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