Abstract
Multiblock polyethylene-chlorinated polyethylene (PE-b-CPE) copolymers were prepared by partial chlorination of various polyethylenes. The resulting copolymers have partial miscibility with polyolefins, PVC, and chlorinated PVC (CPVC). These copolymers can be used as compatibilizers for blends of PVC with polyolefin elastomers (POE), polyethylene (PE), polypropylene (PP), and butadiene copolymers (ABS/MBS). The efficiency of PE-b-CPE in compatibilizing several olefin-based polymers and copolymers with PVC were studied. A polyolefin elastomer impact-modifier system for rigid PVC compounds was developed using PE-b-CPE as compatibilizer. The properties of the impact modifier blend and the advantages over conventional modifiers are shown. Improvement of interfacial adhesion between ABS/MBS modifiers with PVC and the effect of PE-b-CPE addition on the impact properties of PVC compounds are discussed.