Single-Site,Single-Component Catalysts for Very High Molecular Weight Polyethylene:A Robust'Ready-To-Go'Vanadium pi-Bonded Complex Without a Preformed V-C Bond

摘要

Among the plethora of metals capable of performing ethylene polymerization,oligomerization,and copolymerization,vanadium has traditionally played a relatively minor role.Nonetheless,the perfectly random copolymerization performed by some vanadium catalysts makes these derivatives commercially irreplaceable for EPDM production(EPDM=ethylene propylene diene monomer).