Copper-Based Olefin Polymerization Catalysts

摘要

Novel copper (Ⅱ) bis-benzimidazole complexes were prepared. These complexes were synthesized using three steps: condensation, alkylation and complexation. The complexes were characterized by melting point, elemental analysis, IR, ~1H and ~(13)C NMR spectroscopy and X-ray crystallography. These complexes, upon activation with MAO, polymerize ethylene. The polyethylene obtained was typically a high molecular weight and a high melting polymer. The ~(13)C NMR of polyethylene prepared by Cu BBIM/MAO contains no detectable branches. The ethylene homopolymerization data are consistent with a single-site coordination/insertion mechanism based upon the high degree of linearity and narrow MWD in the product.