Polymerization of 1-hexene, 1-octene catalyzed by Cp′TiCl 2(O-2,6- iPr 2C 6H 3)–MAO system. Unexpected increase of the catalytic activity for ethylene/1-hexene copolymerization by (1,3- tBu 2C 5H 3)TiCl 2(O-2,6- iPr 2C 6H 3)–MAO catalyst system

Abstract

Although (1,3- t Bu 2C 5H 3)TiCl 2(O-2,6- i Pr 2C 6H 3) ( 4) showed the lowest catalytic activity for polymerization of 1-hexene, 1-octene with the series of Cp′TiCl 2(O-2,6- i Pr 2C 6H 3) [Cp′= Cp, t BuC 5H 4, 1,3-Me 2C 5H 3, 1,3- t Bu 2C 5H 3, and C 5Me 5]–methylaluminoxane (MAO) catalysts, 4 exhibited the significant catalytic activity for copolymerization of ethylene with 1-hexene, resulting in obtaining a copolymer with relatively high 1-hexene content (20.2–36.5 mol%) with relatively narrow molecular weight distribution.