Abstract
The functional form g for the composition-dependent interaction parameter previously obtained for the isotactic and atactic poly(vinyl methyl ether) (i- and a-PVME)/atactic polystyrene (PS) blends are used to predict the rate of phase separation in terms of the apparent diffusion constant. The Flory-Huggins-Staverman (F-H-S) analysis of cloud-point curves predicts a drastically slower rate of phase separation for i-PVME in blends with PS in comparison with a-PVME blends. The rate of phase separation is experimentally determined for these blends using light scattering.
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