Ethylene Polymerization Catalyzed by Diimine-Palladium(II)Complexes Modified on Silicas

摘要

Both mesoporous(MCM-41)and spherical silica supported palladium-based diimine catalysts were prepared and their behaviors on ethylene polymerization were studied.The results showed that good catalytic activities could be reached with cocatalyst sodium tetraarylborate.Ethylene polymerization with palladium-based catalysts in mesoporous silicas(MCM-41)gave polymers with less branched chains than those obtained with the corresponding homogeneous catalyst.