Highly Active, Thermally Stable, Ethylene-Polymerisation Pre-Catalysts Based on Niobium/TantalumImine Systems (pages 8884–8899)
Prof. Carl Redshaw, Mark Walton, Dr. Lucy Clowes, Dr. David L. Hughes, Dr. Anna-Marie Fuller, Dr. Yimin Chao, Dr. Alex Walton, Dr. Victor Sumerin, Dr. Pertti Elo, Dr. Igor Soshnikov, Dr. Weizhen Zhao and Prof. Wen-Hua Sun
Version of Record online: 16 MAY 2013 | DOI: 10.1002/chem.201300453
Ta very much: The combination of a niobium or tantalum pre-catalyst that contains an imine-based ligand set and a MeAlCl2 (MADC) co-catalyst is capable, in the presence of ethyl trichloroacetate (ETA), of polymerising ethylene with activities in excess of 11 000 g mmol−1 h−1 bar−1 for niobium and 20 000 g mmol−1 h−1 bar−1 for tantalum. These systems produced essentially linear, high-molecular-weight polyethylene.