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

doi:10.1002/(SICI)1521-3935(19990601)200:6<1561::AID-MACP1561>3.0.CO;2-A

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 journal › Article › Scientific › peer-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 language	English
Pages (from-to)	1561-1565
Number of pages	5
Journal	Macromolecular Chemistry and Physics
Volume	200
Issue number	6
DOIs	https://doi.org/10.1002/(SICI)1521-3935(19990601)200:6<1561::AID-MACP1561>3.0.CO;2-A
Publication status	Published - Jun 1999
MoE publication type	A1 Journal article-refereed

Keywords

ethylene copolymers
metallocene catalysts
siloxy-substitution

Access to Document

10.1002/(SICI)1521-3935(19990601)200:6<1561::AID-MACP1561>3.0.CO;2-A

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title = "Copolymerization of ethylene with 1-hexene or 1-hexadecene over siloxy-substituted metallocene catalysts",

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.",

keywords = "ethylene copolymers, metallocene catalysts, siloxy-substitution, ethylene copolymers, metallocene catalysts, siloxy-substitution, ethylene copolymers, metallocene catalysts, siloxy-substitution",

author = "Outi H{\"a}rkki and Petri Lehmus and Reko Leino and Luttikhedde, {Hendrik J. G.} and N{\"a}sman, {Jan H.} and Sepp{\"a}l{\"a}, {Jukka V.}",

year = "1999",

month = jun,

doi = "10.1002/(SICI)1521-3935(19990601)200:6<1561::AID-MACP1561>3.0.CO;2-A",

language = "English",

volume = "200",

pages = "1561--1565",

journal = "Macromolecular Chemistry and Physics",

issn = "1022-1352",

publisher = "WILEY-VCH VERLAG",

number = "6",

}

Copolymerization of ethylene with 1-hexene or 1-hexadecene over siloxy-substituted metallocene catalysts. / Härkki, Outi; Lehmus, Petri; Leino, Reko; Luttikhedde, Hendrik J. G.; Näsman, Jan H.; Seppälä, Jukka V.

In: Macromolecular Chemistry and Physics, Vol. 200, No. 6, 06.1999, p. 1561-1565.

Research output: Contribution to journal › Article › Scientific › peer-review

TY - JOUR

T1 - Copolymerization of ethylene with 1-hexene or 1-hexadecene over siloxy-substituted metallocene catalysts

AU - Härkki, Outi

AU - Lehmus, Petri

AU - Leino, Reko

AU - Luttikhedde, Hendrik J. G.

AU - Näsman, Jan H.

AU - Seppälä, Jukka V.

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AB - 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.

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KW - siloxy-substitution

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