BLOCK CHLORINATED POLYOLEFINS AS PHYSICAL PROPERTY ENHANCERS FOR POLYMER BLENDS

摘要

A means to improve thermoplastic formulations in terms of the physical properties they exhibit, such as impact strength and ductility, have been developed. The addition of a block chlorinated polyolefin (b-CPO) to polymer blends in which at least one component comprises a halogen-free hydrogen-bond acceptor polymer, achieves the desired enhancement. The synergetic effect of the b-CPO with the selected polymer blend is demonstrated. Blends of thermoplastic polyurethanes, polycarbonates, copolyesters and copolymides with a blend partner such as thermoplastic polyolefins, styrene copolymers, high rubber graft copolymers such as acrylonitrile butadiene styrene copolymers, methylmethacrylate butadiene styrene copolymers and the b-CPO have shown to improve impact resistance. The addition of 0.5 wt. % of b-CPO has been shown to improve impact strength by as much as 85% and elongation at break exhibited by the blend by as much as 170%.