The heterogeneous modified-polypropene-supported Ziegler catalyst/MMAO system for producing ultrahigh molecular weight polyethene and poly(ethene-co-hex-1-ene) with a homogeneous comonomer distribution

A heterogeneous modified-polypropene-supported Ziegler catalyst (modified-P P-supported catalyst) combined with modified methylaluminoxane (MMAO) was s uccessfully used for the production of ethene/hex-1-ene copolymers with a h omogeneous distribution of hex-l-ene. The modified-PP-supported catalyst/MM AO also gave polyethene and ethene/hex-1-ene copolymers with ultrahigh mole cular weight ((M) over bar(w) > 2 x 10(6)). The MMAO concentration and hex- l-ene content in the feed were found to affect the activity, comonomer cont ent in the resulting copolymer, and melting temperature, while no influence on the molecular weight and comonomer distribution was detected.