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Vinyl polymerization of norbornene catalyzed by a series of bis(β-ketoiminato)nickel (II) complexes in the presence of methylaluminoxane |
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| Authors: | Feng Bao Xingqiang Lü Qing Wu |
| Institution: | a Institute of Polymer Science, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, China b College of Chemistry, Central China Normal University, Wuhan 430079, China c School of Chemistry and Chemical Engineering, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, China |
| Abstract: | A series of nickel complexes with β-ketoiminato ligands based on pyrazolone derivative were synthesized and characterized, which are highly active catalyst precursors for norbornene polymerization under mild reaction conditions through a vinyl-type polymerization mechanism. The catalytic activity could be up to 3.38 × 107 g polymer/mol Ni h. The molecular weight distributions of the polynorbornenes (Mw/Mn = 2.05-2.56) indicate the presence of a single active species in the polymerization process. |
| Keywords: | β-ketoiminato ligands Nickel complexes Catalyst Norbornene Polymerization |
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