Towards designer polyolefins: highly tuneable olefin copolymerisation using a single permethylindenyl post-metallocene catalyst

Abstract

Using a highly active permethylindenyl-phenoxy (PHENI*) titanium catalyst, high to ultra-high molecular weight ethylene–linear-α-olefin copolymers are prepared in high yields, with exceptional comonomer affinity, and predictable, tuneable composition.

Trends in Structure and Ethylene Polymerization Reactivity of Transition-Metal Permethylindenyl-phenoxy (PHENI*) Complexes

“…Following the synthesis of permethylindenyl-based metallocenes, − Williams et al reported the synthesis of permethylindenyl CGC analogues of the type Me 2 SB­( R N,I*)­TiCl 2 ({(η 5 -C 9 Me 6 )­Me 2 Si­( R N)}­TiCl 2 , where I* = η 5 -C 9 Me 6 ). , Ethylene polymerization activities up to three times that of the Cp* (η 5 -C 5 Me 5 ) derivatives were reported, with more electron-donating amido fragments shown to result in increased catalytic activities . More recently, we have reported the permethylindenyl-phenoxy (PHENI*) ligand, offering exceptional performance in olefinic polymerizations producing ultrahigh-molecular-weight homopolymers and highly tunable copolymers. − …”

“… 25 More recently, we have reported the permethylindenyl-phenoxy (PHENI*) ligand, offering exceptional performance in olefinic polymerizations producing ultrahigh-molecular-weight homopolymers and highly tunable copolymers. 27 − 30 …”