A Bis(phenoxy‐imine)Zr Complex for Ultrahigh‐Molecular‐Weight Amorphous Ethylene/Propylene Copolymer

A new bis(phenoxy-imine)Zr complex has been developed. This complex in conjunction with i Bu 3 Al/ph 3 CB(C 6 F 5 ) 4 at 70°C produces ultrahigh-molecular-weight amorphous ethylene/propylene copolymer with a weight-average molecular weight of 10 200 000g/mol versus polystyrene standards, which represents the highest molecular weight known for linear, synthetic copolymers to date.