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Olefin polymerization with titanium tetrachloride catalysts supported on surface‐modified silica
Author(s) -
Lee Dongho,
Yoon Keunbyoung,
Kang Kyungseok
Publication year - 1995
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1995.030160312
Subject(s) - titanium tetrachloride , catalysis , propene , olefin fiber , polymerization , titanium , ethylene , polymer chemistry , chemistry , surface modification , chloride , olefin polymerization , materials science , organic chemistry , polymer
After modification of silica with benzoyl chloride (BC) to obtain BC‐modified SiO 2 (BC‐SiO 2 ), BC‐SiO 2 /TiCl 4 and BC‐SiO 2 /BEM/TiCl 4 catalysts were prepared by treating the BC‐SiO 2 with TiCl 4 directly or with butylethylmagnesium (BEM) followed by TiCl 4 , respectively. During the modification, BC reacts with hydroxyl groups of silica. In this way the corresponding ester is anchored on the silica surface and the CO group is coordinated with Ti and/or Mg. In addition, BEM is converted to MgCl 2 in the reaction with TiCl 4 . These catalysts have reasonable activities for ethylene or propene polymerization.