PREPARATION OF STYRENIC POLYMER AND CATALYST THEREFOR

摘要

PURPOSE:To prepare a syndiotactic polystyrene by polymerizing a styrenic monomer without using aluminoxane which is expensive and need be used in a large amount. CONSTITUTION:A syndiotactic polystyrene is prepd. effectively at a low cost without using aluminoxane by polymerizing a styrenic monomer in the presence of a catalyst comprising dimethylsilylbis(cyclopentadienyl)titanium dibenzyl and methylferrocenium tetra(pentafluorophenyl)borate or a catalyst comprising these two compds. and triisobutylaluminum.