Miscibility phenomena in polyester/chlorinated polymer blends
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Abstract
Abstract Poly(caprolactone) (PCL)/poly(vinyl chloride) (PVC) blends are known to be miscible in the solid state. Recents measurements however indicate that a large number of polyesters are also miscible with PVC if the ratio CH 2 /CO of the polyester is between 4 and 10. At low CH 2 /CO ratios, polyesters are too rigid to interact specifically with PVC. At high CH 2 /CO ratios, the number of interacting groups becomes too small to give miscibility. Similarly, a large number of chlorinated polymers are shown to be miscible with PCL if their chlorine content is high enough. Surprisingly, polyesters are not in general miscible with chlorinated polymers if the mixture does not contain either PCL or PVC. The results presented in this paper suggest that a dipole‐dipole interaction, between the carbonyl groups and the C‐Cl groups, is responsible for the miscibility phenomena observed in polyester/chlorinated polymer blends.
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