期刊
CATALYSIS COMMUNICATIONS
卷 11, 期 4, 页码 252-256出版社
ELSEVIER
DOI: 10.1016/j.catcom.2009.10.005
关键词
Ethylene; Heterogeneous catalysis; Polymerization; Silicas; Transition metal catalysts
资金
- World Class University Program [R32-2008-000-10174-0]
- MEST [R15-2006-022-01001-0]
- Brain Korea 21 Program (BK-21)
Spherical periodic mesoporous organosilica (SPMO) supported catalyst bearing covalently tethered Ni(II) alpha-diimine complex has been successfully prepared in one-pot protocol reducing tedious and sensitive preparation steps. The SPMO-supported catalyst showed high activities (>10(6) g-PE mol-Ni-1 h(-1) bar(-1)) in the presence of various cocatalysts such as methylaluminoxane and common alkyl aluminums like ethylaluminum sesquichloride, methylaluminum dichloride and diethylaluminum chloride. The thermal stability of the catalyst was enhanced to a great extent by heterogenization and the resulting polyethylenes showed uniform morphology replicating catalyst shape. (C) 2009 Elsevier B.V. All rights reserved.
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