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http://dx.doi.org/10.14478/ace.2014.1055

Immobilization of Metallocene inside the Aminosilane-Functionalized Nanopore of SBA-15 and MCM-41 and Its Ethylene Polymerization  

Celedonio, Jhulimar (Department of Chemical Engineering, Kongju National University)
Lee, Jeong Suk (Department of Chemical Engineering, Kongju National University)
Ko, Young Soo (Department of Chemical Engineering, Kongju National University)
Publication Information
Applied Chemistry for Engineering / v.25, no.4, 2014 , pp. 396-400 More about this Journal
Abstract
The pore surface of mesoporous materials, SBA-15 and MCM-41 were functionalized with organosilanes, 3-aminopropyltrimethoxysilane (1NS) and N-[(3-trimethoxysilyl)propyl]ethylenediamine (2NS) via grafting method. $(n-BuCp)_2ZrCl_2$ and methylaluminoxane (MAO) were impregnated on the surface-functionalized mesoporous materials for the application to ethylene polymerization. In the case of SBA-15/2NS/$(n-BuCp)_2ZrCl_2$ supported Zr and Al contents decreased as grafted 2NS content increased. However, in the case of MCM-41/2NS/$(n-BuCp)_2ZrCl_2$ supported Al content decreased, but Zr content increased as grafted 2NS content increased. The polymerization activity of SBA-15/2NS/$(n-BuCp)_2ZrCl_2$ increased as the amount of grafted 2NS increased. Increase in the amount of grafted 2NS should caused decrease in pore volume and diameter. Consequently, it decreased the amount of supported metallocene and MAO in general. However, the smaller pore-sized MCM-41 could have lower supported MAO content due to its large molecular size in case that MCM-41 was surface-functionalized with 2NS. Therefore, the supported metallocene content could increase and its polymerization activity was higher than that of SBA-15.
Keywords
mesoporous; grafting; polymerization; surface-treated;
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