Diffusion in polymers below the glass transition temperature: Comparison of two approaches based on free volume concepts |
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| Authors: | Narayan Ramesh J. L. Duda |
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| Affiliation: | (1) Center for the Study of Polymer Solvent Systems, Department of Chemical Engineering, Pennsylvania State University, University Park, 16802, PA |
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| Abstract: | 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 freevolume 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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| Keywords: | Diffusivity Self-Diffusion Coefficient Polymers Glass Transition Free-Volume |
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