Norbornene polymerization catalyzed by bispyrazolylimineylimine Nickel(II)/MAO catalytic systems

作者：Wang Yuan Yuan; Zhu Fang Ming; Lin Shang An^*

来源：Chemical Journal of Chinese Universities, 2008, 29(8): 1684-1688.

• bispyrazolylimine nickel complexes
• nobornene polymerization
• vinyl-addition type polymerization

Two bispyrazolylimine nickel complexes[ bis-N-( phenyl-l 3 5-dimethylpyrazolylmetliylene) phenylimine nickel dibromide] (Cat. 1) and [ bis-4-methoxy-N-(phenyl-1,3,5-dimethylpyrazolylmethylene) phenylimine nickel dibromide] ( Cat. 2) were synthesized. Norbornene polymerization catalyzed by Cat. 1/MAO and Cat. 2/MAO systems was investigated. The catalytic efficiency, molecular weight and molecular weight distribution were influenced by the polymerization conditions, Such as the polymerization temperature, Al/Ni molar ratio and catalyst concentration. The results show that Cat. 1/MAO and Cat. 2/MAO, systems displayed a high catalytic efficiency with 10(5) g PNBE/( mol Ni magnitude order. The molecular weights of PNBE were higher than 10(5) and the molecular weight distributions were around 2. According to H-1 NMR and the FTIR spectra, the mechanism of the norbornene polymerization is vinyl-addition type poly merization.

• 出版日期2008-8
• 单位中山大学