COPOLYMERIZATION OF ETHYLENE WITH 1-OCTENE USING Et（Ind）2ZrCl2/MAO CATALYST

Copolymerization of ethylene/1-octene was carried out in toluene withvarious concentrations of comonomer in the feed using Et（Ind）;ZrCl;/MAO （methyl alu-minoxane） as catalyst. It was found that with the increase of 1-octene concentration in thefeed the content of 1-octene in the copolymer increases, while the density, melting point,crystallinity and intrinsic viscosity of copolymer decrease. A copolymer with very lowdensity, containing 11.5 mol% of 1-octene （VLLDPE） can be produced with this catalystsystem. The effect of temperature and zirconium aluminum mole ratio of the catalyst onthe copolymerization was also investigated. The results of;C NMR determination of thecopolymer showed that the 1-octene units in the copolymer are principally isolated.