LONG CHAIN-BRANCHED ETHYLENE-ALPHA OLEFIN COPOLYMER

摘要

An ethylene-alpha olefin copolymer containing long chain branch(lcb) has the narrow distribution of molecular weight and high content of the long-chain branch existing along the main chain within a copolymer. An ethylene-alpha olefin copolymer has (a) the distribution of molecular weight (Mw/Mn) more than 1.5 and less than 3.5, and (b) 3-5 long-chain branches per 1000 carbons along the main chain of the copolymer. The ethylene-alpha olefin copolymer is polymerized with a catalyst composition containing a transition metal oxide of the chemical formula 1.