Polymerization of ethylene by using zirconocene catalyst anchored on silica with trisiloxane and pentamethylene spacers

Dong Ho Lee; Keun Byoung Yoon; Seok Kyun Noh

doi:10.1002/marc.1997.030180510

Polymerization of ethylene by using zirconocene catalyst anchored on silica with trisiloxane and pentamethylene spacers

Dong Ho Lee, Keun Byoung Yoon, Seok Kyun Noh

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Abstract

New supported catalysts on the basis of cyclopentadienylindenylzirconium dichloride (CpIndZrCl₂) anchored on silica with a trisiloxane spacer (ZATS) and a pentamethylene spacer (ZAPM) were prepared and used for ethylene polymerization with modified methylaluminoxane (MAO) as cocatalyst. ZATS and ZAPM produce polyethylene with lower molecular weight but show higher activity than silica-supported CpIndZrCl₂ which was prepared by reacting zirconocene directly with silica, i.e., the activity of silica-supported CpIndZrCl₂ is enhanced by introducing a spacer between silica surface and metallocene species.

Original language	English
Pages (from-to)	427-431
Number of pages	5
Journal	Macromolecular Rapid Communications
Volume	18
Issue number	5
DOIs	https://doi.org/10.1002/marc.1997.030180510
State	Published - May 1997

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title = "Polymerization of ethylene by using zirconocene catalyst anchored on silica with trisiloxane and pentamethylene spacers",

abstract = "New supported catalysts on the basis of cyclopentadienylindenylzirconium dichloride (CpIndZrCl2) anchored on silica with a trisiloxane spacer (ZATS) and a pentamethylene spacer (ZAPM) were prepared and used for ethylene polymerization with modified methylaluminoxane (MAO) as cocatalyst. ZATS and ZAPM produce polyethylene with lower molecular weight but show higher activity than silica-supported CpIndZrCl2 which was prepared by reacting zirconocene directly with silica, i.e., the activity of silica-supported CpIndZrCl2 is enhanced by introducing a spacer between silica surface and metallocene species.",

author = "Lee, {Dong Ho} and Yoon, {Keun Byoung} and Noh, {Seok Kyun}",

year = "1997",

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journal = "Macromolecular Rapid Communications",

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T1 - Polymerization of ethylene by using zirconocene catalyst anchored on silica with trisiloxane and pentamethylene spacers

AU - Lee, Dong Ho

AU - Yoon, Keun Byoung

AU - Noh, Seok Kyun

PY - 1997/5

Y1 - 1997/5

N2 - New supported catalysts on the basis of cyclopentadienylindenylzirconium dichloride (CpIndZrCl2) anchored on silica with a trisiloxane spacer (ZATS) and a pentamethylene spacer (ZAPM) were prepared and used for ethylene polymerization with modified methylaluminoxane (MAO) as cocatalyst. ZATS and ZAPM produce polyethylene with lower molecular weight but show higher activity than silica-supported CpIndZrCl2 which was prepared by reacting zirconocene directly with silica, i.e., the activity of silica-supported CpIndZrCl2 is enhanced by introducing a spacer between silica surface and metallocene species.

AB - New supported catalysts on the basis of cyclopentadienylindenylzirconium dichloride (CpIndZrCl2) anchored on silica with a trisiloxane spacer (ZATS) and a pentamethylene spacer (ZAPM) were prepared and used for ethylene polymerization with modified methylaluminoxane (MAO) as cocatalyst. ZATS and ZAPM produce polyethylene with lower molecular weight but show higher activity than silica-supported CpIndZrCl2 which was prepared by reacting zirconocene directly with silica, i.e., the activity of silica-supported CpIndZrCl2 is enhanced by introducing a spacer between silica surface and metallocene species.

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DO - 10.1002/marc.1997.030180510

M3 - Article

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SN - 1022-1336

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EP - 431

JO - Macromolecular Rapid Communications

JF - Macromolecular Rapid Communications

IS - 5

ER -

Polymerization of ethylene by using zirconocene catalyst anchored on silica with trisiloxane and pentamethylene spacers

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