Copolymerization of ethylene with 1-hexene or 1-hexadecene over siloxy-substituted metallocene catalysts

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Harkki O, Lehmus P, Leino R, Luttikhedde HJG, Nasman JH, Seppala JV
Publisher: WILEY-V C H VERLAG GMBH
Publication year: 1999
Journal: Macromolecular Chemistry and Physics
Journal acronym: MACROMOL CHEM PHYSIC
Volume number: 200
Issue number: 6
Start page: 1561
End page: 1565
Number of pages: 5
ISSN: 1022-1352


Abstract

A series of ethylene copolymerizations with 1-hexene or 1-hexadecene over four different siloxy-substituted ansa-metallocene/methylaluminoxane (MAO) catalyst systems was studied. High copolymerization activities and comonomer responses were observed in all cases and high molecular weight ethylene copolymers were obtained. Unsaturations resulting from vinyl and vinylidene double bonds were observed in the produced copolymers. It can be concluded that the position of the siloxy substituent has a large influence on polymerization activity and that the replacement of the tert-butyldimethylsiloxy groups with tri-isopropylsiloxy groups increases copolymerization ability of the catalysts.

Last updated on 2020-25-05 at 05:35