POLYOLEFIN COMPOSITE MATERIAL AND METHOD FOR PRODUCING THE SAME

摘要

The present invention belongs to polyolefin alloy preparation field, particularly relates to obtaining polyolefin composite material having good morphology, adjustable composition and adjustable property by controlling composite catalyst consisting of Zieglar-Natta catalyst and metallocene catalyst to function stepwise. The material consists of propylene polymer and ethylene copolymer, said ethylene copolymer is obtained by copolymerizing ethylene with alpha olefin or diene, wherein alpha olefin or diene molar content in the ethylene copolymer is from 0% to 60%, the ethylene copolymer comprises from 3 to 80wt% of the polyolefin composite material; said polyolefin composite material has particle morphology, the ethylene copolymer molecular weight distribution is from 1 to 6, glass transition temperature is from -80 to 0 "C; the ethylene copolymer produced in reaction is uniformly dispersed in the propylene polymer particle to form the polyolefin composite material.