Catalysts for UHMWPE and UHMWPE-copolymers

摘要

Classic inorganic and more recent organometallic compounds capable of polymerizing ethylene to ultra high molecular are compared. Activated catalysts showed varying degrees of productivity when challenged with co-monomers. The general activity trend followed TiCl_3 < Mg/Si-TiCl_3 < metallocenes. A new phenoxyimine catalyst complex N-(3,5- diiodosalicylidene)cycloheptylamine titanium dichloride was useful in making UHMWPE and compared to previously reported phenoxyimine catalyst structures capable of living polyolefin polymerizations.