Compatibility and thermal stability studies on PVC/chlororubber‐20‐graft polyblend‐styrene–vinyl acetate–acrylonitrile blends. II

摘要

AbstractCompatibility and Thermal stability studies have been performed on PVC blends with chlororubber‐20‐graft polyblend‐styrene–vinyl acetate–acrylonitrile (1:1:1) CR‐20gp‐SVAAN (1:1:1). The grafting of styrene, vinyl acetate, and acrylonitrile onto chlororubber‐20 backbone chain generates some amount of heterogeneity in the system. The compatibility behavior of PVC/CR‐20gp‐SVAAN (1:1:1) blends has been reflected in the ultrasonic velocity and absolute viscosity vs. composition plots of the blend. These blends have been found to be thermally miore stable than PVC/chlororubber‐20 blends, but less stable than PVC/KM‐365B blends. The rate of degradation is equal to that of the PVC/chlororubber‐20 blends. The results have been discussed on the basis of compatibility, stabilizing, and destabilizing behavior of various component