Efficient Terpolymerization of Ethylene and Styrene with 1,7-Octadiene by Aryloxo Modified Half-Titanocenes–Cocatalyst Systems: Efficient Introduction of the Reactive Functionality

摘要

Terpolymerization of ethylene and styrene (St) with 1,7-octadiene (OD) using aryloxo-modifi ed half-titanocenes, Cp' TiCl_2 (O-2,6- i Pr_2 C_6H_3) [Cp' = Cp~* (1), ~tBuC_5H_4 (2), 1,2,4-Me_3 C_5 H_2 (3)], proceeds with high catalytic activity and efficient comonomer incorporation, affording high-molecular-weight polymers with unimodal molecular-weight distributions (uniform compositions). An efficient introduction of the reactive functionality, terminal olefinic double bonds, into the side-chain is attained by adopting this method by incorporation of OD without cyclization: the comonomer contents (St, OD) can be controlled by varying the comonomer concentration charged. The resultant polymers possess negligible resonance, ascribed to St–OD repeated insertion.