A bis(phenoxy-imine)Zr complex for ultrahigh-molecular-weight amorphous ethylene/propylene copolymer

Ishii S; Saito J; Matsuura S; Suzuki Y; Furuyama R; Mitani M; Nakano T; Kashiwa N; Fujita T

Macromolecular Rapid Communications, Vol.23, No.12, 693-697, 2002

DOI10.1002/1521-3927(20020801)23:12<693::AID-MARC693>3.0.CO;2-6 Export Citation

A bis(phenoxy-imine)Zr complex for ultrahigh-molecular-weight amorphous ethylene/propylene copolymer

Ishii S, Saito J, Matsuura S, Suzuki Y, Furuyama R, Mitani M, Nakano T, Kashiwa N, Fujita T

A new bis(phenoxy-imine)Zr complex has been developed. This complex in conjunction with (Bu3Al)-Bu-t/Ph3CB(C6F5)(4) at 70degreesC produces ultrahigh-molecular-weight amorphous ethylene/propylene copolymer with a weight-average molecular weight of 10200000 g/mol versus polystyrene standards, which represents the highest molecular weight known for linear, synthetic copolymers to date.

Keywords:catalysts;copolymerization;elastomers;polyolefins;Ziegler-Natta polymerization