The free‐volume theory of diffusion is used to analyze the temperature dependence of solvent self‐diffusion coefficients both above and below the glass transition temperature at concentrations removed from the pure polymer limit. The glass transition can have a pronounced effect on the temperature dependence of solvent self‐diffusion coefficients at small solvent concentrations, but the theory predicts a decreased effect of the transition on the diffusion process with increasing solvent concentration.
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Vrentas et al. (1988) studied this question.
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