Abstract
The diffusion coefficient of phenol in polyester films was estimated at various concentrations and temperatures in order to elucidate a role of carriers in dyeing process of polymer. The diffusion coefficient of phenol in the amorphous region of polymer increased with increasing both concentration and temperature. This suggests that the sorbed phenol accelerates the segmental motion of the polymer chain.At the same time, dynamic moduli of two kinds of films were measured in phenol solutions at various temperatures and the dynamic moduli in the amorphous region EA' was calculated assuming the phenol was sorbed only in the amorphous region of polymer. Linear relationship was generally obtained between the EA' and the diffusion coefficients in amorphous region DA(c)in high concentration region of phenol. However, EA' deviated slightly from linear relation in low concentration region, which was attributed to the internal fine structure of each sample.
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