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 TiCl3 < Mg/Si-TiCl3 < 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. (C) 2010 Elsevier B. V. All rights reserved.