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Ethylene polymerization over MgO‐supported zirconocene catalysts
Author(s) -
Kim Soo Jin,
Lee Wha Young,
Park Yeungho,
Huh Wansoo,
Ko Young Gwan
Publication year - 2003
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10085
Subject(s) - methylaluminoxane , polymerization , catalysis , materials science , ethylene , polymer , coordination polymerization , metal , molar mass distribution , polymer chemistry , metallocene , chemical engineering , solution polymerization , organic chemistry , composite material , chemistry , metallurgy , engineering
Supported zirconcene catalysts on a new support, MgO, were prepared and tested in ethylene polymerization. Three types of impregnation methods were employed to find an optimum supporting method for MgO. The direct impregnation of Cp 2 ZrCl 2 on MgO showed low metal loading and polymerization activity, while the catalyst had a higher metal loading and polymerization activity when MgO was treated with methylaluminoxane (MAO) before supporting. Treatment of MgO with MAO during the supporting step invoked two types of catalytic sites, which was evidenced by the bimodal molecular weight distribution of the polymer products. MgO is considered to have potential as a support for metallocenes.