New Approaches in Polymerizations Using Transition Metal Complexes

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Abstract

New approaches to organo-transition-metal catalyzed-polymerizations of methyl methacrylate (MMA), ethylene, and 1-olefins using modified methylalumoxane (MMAO) as cocatalyst are described. Ni (acac) <SUB>2</SUB>, (C<SUB>5</SUB>H<SUB>5</SUB>) Ni (η<SUP>3</SUP>-C<SUB>3</SUB>H<SUB>5</SUB>), [NiMe<SUB>4</SUB>Li<SUB>2</SUB> (THF) <SUB>2</SUB>] <SUB>2</SUB> coupled with MMAO showed a good catalytic activity toward the polymerization of MMA. A variety of (C<SUB>5</SUB>R<SUB>5</SUB>dP) (η<SUP>3</SUP>-C<SUB>3</SUB>H<SUB>5</SUB>) also showed good catalytic activities for the polymerization of MMA, while these initiators exhibited no catalysis for the polymerizations of ethylene and 1-olefins. V (1-R, 3-R'-acac) <SUB>3</SUB>/MMAO systems showed a moderate catalytic activity for the polymerization of ethylene, while the polymerization using (2-dimethylaminoethyl-C<SUB>5</SUB>Me<SUB>4</SUB>) VCl<SUB>2</SUB> produced high-molecular-weight polyethylenes. [6-Thiobis (2, 4-di-<I>tert</I>-butyl-phenolate)] VOCl<SUB>2</SUB>, and (<I>N</I>, <I>N</I>'-di-<I>tert</I>-butyl-1, l'binaphthyl-2, 2'-diamino) VOCl<SUB>2</SUB> exhibited a higher catalytic activity for the polymerization of ethylene. The (Ind) CH<SUB>2</SUB>CH<SUB>2</SUB>NMe<SUB>2</SUB>CrCl<SUB>2</SUB>/MMAO system also showed a high catalytic activity. Me<SUB>2</SUB>Si bridged lanthanocene complexes showed high catalytic activity for both block copolymerizations of ethylene with polar monomers such as MMA or ε-caprolactone and the block copolymerizations of 1-hexene with polar monomers.

Journal

  • Journal of Synthetic Organic Chemistry, Japan

    Journal of Synthetic Organic Chemistry, Japan 58(11), 1084-1094, 2000-11-01

    The Society of Synthetic Organic Chemistry, Japan

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Codes

  • NII Article ID (NAID)
    10008822283
  • NII NACSIS-CAT ID (NCID)
    AN0024521X
  • Text Lang
    ENG
  • Article Type
    REV
  • ISSN
    00379980
  • NDL Article ID
    5549726
  • NDL Source Classification
    ZP11(科学技術--化学・化学工業--有機化学・有機化学工業)
  • NDL Call No.
    Z17-256
  • Data Source
    CJP  NDL  J-STAGE 
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