Study On The Relationship Between Compositions And Properties Of CPVC/ABS Blends

Chlorinated polyvinyl chloride (CPVC) has better mechanical properties and flame retardant properties than PVC,because CPVC has higher chlorine content.But the processing properties and impact strength of CPVC is poorer.In this paper,we chose acrylonitrile-butadiene-styrene (ABS) as processing modifier and CPE as toughness modifier in order to modify CPVC. The mechanical properties,flame retardant properties and rheological properties of blend system were studied and various factors in the formulations which could influence the properties of ternary blends were analyzed in order to obtain better formulations and processing technics of the ternary blends.The results showed that chlorinated polyethylene(CPE) had good toughening effect on CPVC/ABS/CPE ternary blends. The torques of CPVC/ABS/CPE ternary blends decreased significantly with the content of ABS increasing.CPVC/ABS/CPE ternary blends would have better mechanical properties when the ratio of CPVC and ABS is 7:3. Improvement of flame retardant properties of blend system was preferred by introducing Sb2O3.The good lubricant system can not only lowered torques of blend system, but also extended the thermal stability time of blends system.