Miscibility of PVC with chlorinated PE and chlorinated PVC

Miscibility of PVC with chlorinated PE and chlorinated PVC was reviewed. The miscible region of chlorine content ranged from 44 wt% to 65 wt%, which was not symmetric to the chlorine content of PVC, 56.7 wt%. Two group contribution methods were used to calculate solubility parameters of polymers. The results of solubility parameters showed a more symmetric miscible region with respect to the value of PVC. However, the ranges of miscibility were different. It was 2.3 (J/cm 3 ) 0.5 in a three-dimensional method and was 1.5 (J/cm 3 ) 0.5 in the Fedors method.