Synthesis of high-molecular-weight elastomeric poly(propylene) with half-titanocene/MAO catalyst

摘要

A novel catalyst precursor, (#eta#~5-pentamethylcyclopentadienyl)titanium triallyloxide (Cp~*Ti(OCH_2-CH=CH_2)_3), was prepared and employed in a study of propylene polymerization in the presence of methylaluminoxane (MAO). This work has revealed that the half-titanocene catalyst is desirable for the production of elastomeric poly(propylene) with high molecular weight (M-bar_w=8-69 X 10~4) as well as in good yields under typical polymerization conditions.