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Copolymerization of Ethylene and Propylene Using Silicon Tetrachloride‐Modified Silica/MAO with Et[Ind] 2 ZrCl 2 Metallocene Catalyst
Author(s) -
Chao Chariya,
Pratchayawutthirat Waraporn,
Praserthdam Piyasan,
Shiono Takeshi,
Rempel Garry L.
Publication year - 2002
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 - 10.1002/1521-3927(20020801)23:12<672::aid-marc672>3.0.co;2-i
Subject(s) - metallocene , copolymer , ethylene , silicon tetrachloride , dispersity , materials science , polymer chemistry , ethylene propylene rubber , catalysis , post metallocene catalyst , olefin fiber , silicon , organic chemistry , chemistry , polymerization , composite material , polymer , metallurgy
For the copolymerization of ethylene with propylene or a higher α ‐olefin, using Et[Ind] 2 ZrCl 2 metallocene catalyst, modification of silica with silicon tetrachloride prior to MAO adsorption can increase the activity, which is more pronounced for ethylene/1‐hexene copolymerization at higher pressure and temperature. The molecular weight of the copolymer produced was lower and the polydispersity tends to be decreased. No significant effect of SiCl 4 addition on the microstructure and the chemical composition distribution of the copolymer produced was observed.