Titanium (IV) precursors anchored to alkyl substituted polyhedral oligomeric silsesquioxane (POSS) trisilanol and disilanol were prepared and characterized. These catalysts, formulated as [Ti-POSS(O∩O∩O)OPri, 1] and [Ti-(POSS(O∩O))2, 2], were found to be active in the polymerization of ethylene at high temperatures in combination with ethylaluminum sesquichloride (Et3Al2Cl3) as a co-catalyst. The polyethylene products so obtained are linear, crystalline and display narrow dispersities. The effect of various reaction parameters on the catalyst performance is described.
Baney, RH, Itoh, M, Sakakibara, A, Suzuki, T (1995) Chem Rev. 95:1409–1430.