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

Outi Härkki, Petri Lehmus, Reko Leino, Hendrik J. G. Luttikhedde, Jan H. Näsman, Jukka V. Seppälä*

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    16 Citations (Scopus)

    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 triisopropylsiloxy groups increases copolymerization ability of the catalysts.

    Original languageEnglish
    Pages (from-to)1561-1565
    Number of pages5
    JournalMacromolecular Chemistry and Physics
    Volume200
    Issue number6
    DOIs
    Publication statusPublished - Jun 1999
    MoE publication typeA1 Journal article-refereed

    Keywords

    • ethylene copolymers
    • metallocene catalysts
    • siloxy-substitution

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