BLENDS OF POLY(VINYL CHLORIDE) WITH ACRYLONITRILE-CHLORINATED POLYETHYLENE-STYRENE COPOLYMER .2. MECHANICAL-PROPERTIES

Blends of poly( vinyl chloride) (PVC) and acrylonitrile-chlorinated po lyethylene-styrene (ACS) graft copolymer were prepared by melt blendin g. Mechanical properties were studied by the use of dynamic mechanical analysis (DMA), impact tests, tensile tests, and scanning electron mi croscopy (SEM). The DMA study showed that PVC is immiscible with chlor inated polyethylene in ACS but partially miscible with poly( styrene-c o-acrylonitrile) (25% acrylonitrile content) in ACS. Mechanical proper ty tests showed that there is a significant increase in the impact str ength while other good mechanical properties of PVC such as high modul us and high strength remain. SEM observations supported the results of the mechanical properties studies. (C) 1997 John Wiley & Sons, Inc.