Supporting of nickel(II) acenaphthenediimine with free amino group for ethylene polymerization



Bis (4-(4-amino-3, 5-diethylbenzyl)-2, 6-diethylphenylimino) acenaphthene] dichloronickel (NiLCl2) was prepared and supported on SiO2 modified by methyl trichlorsilane(S-1) and on SiO2-MgCl2/TiCl4 (S-2) respectively. Two supported catalysts S-1 and S-2 used as catalysts for ethylene polymerization were studied and the influences of various polymerization conditions, including the polymerization temperature, cocatalysts, Al/Ni molar ratio on the catalytic activity, branching degree and branch length of PE were also investigated. The experimental results show that the supported catalysts exhibit higher catalytic activity for ethylene polymerization, the highest catalytic activity of S-1 using AlEt2Cl as cocatalyst at 50°C, reaching 5.8×105gPE/molNi··h, and needed lower Al/Ni molar ratio compared to homogeneous analogue.

Key words

nickel diimine complex supported catalyst branched polyethylene diethylaluminium chloride 


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Copyright information

© Wuhan University of Technology and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Yangjian Hu (胡扬剑)
    • 1
  • Weiyu Hu
    • 1
  • Haihua Wang
    • 2
  1. 1.Department of Chemistry and Chemical EngineeringHuaihua CollegeHuaihuaChina
  2. 2.School of Chemistry and Chemical EngineeringSun Yetsen UniversityGuangzhouChina

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