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Metallocene was supported on the silica, which was functionalized with aminosilanes such as aminopropyltrimethoxysilane (1NS) or N-[3-(trimethoxysilyl)propyl]ethylenediamine (2NS), and ionic liquids such as 1-butyl-4methylpyridinium chloride (Cl), tributylmethylammonium chloride (Amm), benzyldimethyltetradecylammonium chloride (Ben), 1-butyl-1-methylpyrrolidinium chloride (Pyr), and then ethylene polymerizations were performed. The Zr contents of SiO2/1NS/IL/(n-BuCp)2ZrCl2 and SiO2/2NS/IL/(n-BuCp)2ZrCl2 were lower than those of only aminosilane-treated silicas. However, the polymerization activity of SiO2/1NS/IL/(n-BuCp)2ZrCl2 was higher than that of SiO2/1NS/(nBuCp)2ZrCl2. The polymerization activity of SiO2/2NS/IL/(n-BuCp)2ZrCl2 was lower than that of SiO2/2NS/(nBuCp)2ZrCl2 due to much lower Zr content.

Preparation of Metallocene Catalysts Supported on Aminosilane and Ionic Liquids Functionalized Silica and its Ethylene Polymerization