Synthesis of Novel Tetrahydrofluorenyl-Containing Group IV Metallocenes for the Ziegler−Natta Type Polymerization of α-Olefins
作者:Emma J. Thomas、Marvin D. Rausch、James C. W. Chien
DOI:10.1021/om0005046
日期:2000.12.1
and evaluated as Ziegler−Natta type catalysts for ethylene and propylene polymerization. The complexes were found to be highly stable compared to some bis-fluorenylzirconocenes. Polypropylene and polyethylene were produced in good yield using the new catalyst precursors with MAO or Trityl/TIBA as cocatalysts. Both the unsubstituted and substituted bridged bis-tetrahydrofluorenyl zirconocenes were isolated