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Chem. J. Chinese Universities ›› 2006, Vol. 27 ›› Issue (2): 375.

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Synthesis of Complex(1,2\|Ph2-4-MeCp)2ZrMe2 and Catalysis for Ethylene Polymerization         

Lu Chun-Sheng1,2,  ZHANG Fan 1,  MU Ying 1,  LI Xue-Fu1   

  1. 1. College of Chemistry,  Key Supramolecular Structure and Material of Ministry of Education, 
    Jilin University,  Changchun 130012,  China;
    2. Department of Chemical Engineering,  Daqing Petroleum Institute,  Daqing 161300,  China
  • Received:2005-01-27 Online:2006-02-10 Published:2006-02-10
  • Contact: MU Ying ,E-mail:ymu@mail.jlu.edu.cn

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Abstract:

AbstractA new dialkylzirconocene type of  complex, (1,2-ph2-4-MeCp)2ZrMe2(2),  was synthesized by reaction of (1,2-Ph2-4-MeCp)2ZrCl2(1) and with 2  equivalent of methyl lithium at -78 ℃. Complex 2 was charcterized by elemental analysis,  1H NMR and  13C NMR.  The structure of complex 2 was determined by single crystal X-ray structural  analysis. Upon activation with Al( i Bu)3/Ph3C+B(C6F5)-4,  complex 2 showed a high catalytic activity for the ethylene polymerization reaction at  lower  n(Al)/n(Zr) ratios and high molecular  weight polyethylene samples with high melting transition temperatures were  produced. The polyethylene samples were characterized by molecular weight determination, DSC and XRD analysis.

Key words: Metallocene catalyst; Zirconocene; Ethylene polymerization; Olefin polymerization; Homogeneous catalysis

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