COPOLYMERIZATION OF ETHYLENE AND LINEAR 1-OLEFINS WITH A METALLOCENE CATALYST SYSTEM UNDER HIGH-PRESSURE .1. COPOLYMERIZATION OF ETHYLENE AND PROPENE

The copolymerization of ethylene and propene under high-pressure and high temperature was examined using a metallocene/methylaluminoxane catalyst system. The polymerization was performed in a continuously operated stirred autoclave at 150 MPa and in the temperature range between 393 K and 493 K. The ratio of aluminium to catalyst metal used was 22000 mol Al/mol Zr based upon a metallocene concentration of 6 x 10(-3) mol-ppm in the feed. The reactivity ratios and the productivity as well as the physical properties of the resulting polymers were determined.