Syndiospecific polymerizations of styrene with siloxane-bridged dinuclear titanocenes and MAO catalyst systems

Dong Ho Lee; Keun Byoung Yoon; Seok Kyun Noh; Sang Sun Woo

doi:10.1002/masy.19971180118

Syndiospecific polymerizations of styrene with siloxane-bridged dinuclear titanocenes and MAO catalyst systems

Dong Ho Lee
, Keun Byoung Yoon
, Seok Kyun Noh
, Sang Sun Woo

Kyungpook National University
Yeungnam University
Samsung

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

11 Scopus citations

Abstract

The syndiotactic polymerizations of styrene are carried out with dinuclear titanocenes such as tetramethyldisiloxanediylbis(cyclopentadienyltitanium trichloride), Cl₃Ti-CpSi(CH₃)₂-O-Si(CH₃) ₂-Cp-TiCl₃ (1), hexamethyltriSiloXanediylbis(cyclopentadienyltitanium trichloride), Cl₃Ti-CpSi(CH₃)₂-O-Si(CH₃) ₂-O-Si(CH₃)₂Cp-TiCl₃ (2) and hexamethyltrisiloXanediylbis(dicyclopentadienyltitanium dichloride), Cl₂CpTi-CpSi(CH₃)₂-O-Si-(CH₃) ₂-O-Si(CH₃)₂Cp-TiCpCl₂ (3) in the presence of modified methylaluminoxane (MMAO). Although the catalyst activity of dinuclear titanocenes is lower than that of the corresponding mononuclear titanocenes CpTiCl₃ and Cp₂TiCl₂, the former produce polystyrene of higher weight-average molecular weight and higher syndiotactic index than the latter. Among the dinuclear titanocenes examined, 2 has the largest catalyst activity. In addition, the copolymerizations of styrene and ethylene are carried out with 2.

Original language	English
Pages (from-to)	129-134
Number of pages	6
Journal	Macromolecular Symposia
Volume	118
DOIs	https://doi.org/10.1002/masy.19971180118
State	Published - Jun 1997

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@article{2baa7681d0c94e748acef4fc8c6052f9,

title = "Syndiospecific polymerizations of styrene with siloxane-bridged dinuclear titanocenes and MAO catalyst systems",

abstract = "The syndiotactic polymerizations of styrene are carried out with dinuclear titanocenes such as tetramethyldisiloxanediylbis(cyclopentadienyltitanium trichloride), Cl3Ti-CpSi(CH3)2-O-Si(CH3) 2-Cp-TiCl3 (1), hexamethyltriSiloXanediylbis(cyclopentadienyltitanium trichloride), Cl3Ti-CpSi(CH3)2-O-Si(CH3) 2-O-Si(CH3)2Cp-TiCl3 (2) and hexamethyltrisiloXanediylbis(dicyclopentadienyltitanium dichloride), Cl2CpTi-CpSi(CH3)2-O-Si-(CH3) 2-O-Si(CH3)2Cp-TiCpCl2 (3) in the presence of modified methylaluminoxane (MMAO). Although the catalyst activity of dinuclear titanocenes is lower than that of the corresponding mononuclear titanocenes CpTiCl3 and Cp2TiCl2, the former produce polystyrene of higher weight-average molecular weight and higher syndiotactic index than the latter. Among the dinuclear titanocenes examined, 2 has the largest catalyst activity. In addition, the copolymerizations of styrene and ethylene are carried out with 2.",

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

year = "1997",

month = jun,

doi = "10.1002/masy.19971180118",

language = "English",

volume = "118",

pages = "129--134",

journal = "Macromolecular Symposia",

issn = "1022-1360",

publisher = "Wiley-VCH Verlag",

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TY - JOUR

T1 - Syndiospecific polymerizations of styrene with siloxane-bridged dinuclear titanocenes and MAO catalyst systems

AU - Lee, Dong Ho

AU - Yoon, Keun Byoung

AU - Noh, Seok Kyun

AU - Woo, Sang Sun

PY - 1997/6

Y1 - 1997/6

N2 - The syndiotactic polymerizations of styrene are carried out with dinuclear titanocenes such as tetramethyldisiloxanediylbis(cyclopentadienyltitanium trichloride), Cl3Ti-CpSi(CH3)2-O-Si(CH3) 2-Cp-TiCl3 (1), hexamethyltriSiloXanediylbis(cyclopentadienyltitanium trichloride), Cl3Ti-CpSi(CH3)2-O-Si(CH3) 2-O-Si(CH3)2Cp-TiCl3 (2) and hexamethyltrisiloXanediylbis(dicyclopentadienyltitanium dichloride), Cl2CpTi-CpSi(CH3)2-O-Si-(CH3) 2-O-Si(CH3)2Cp-TiCpCl2 (3) in the presence of modified methylaluminoxane (MMAO). Although the catalyst activity of dinuclear titanocenes is lower than that of the corresponding mononuclear titanocenes CpTiCl3 and Cp2TiCl2, the former produce polystyrene of higher weight-average molecular weight and higher syndiotactic index than the latter. Among the dinuclear titanocenes examined, 2 has the largest catalyst activity. In addition, the copolymerizations of styrene and ethylene are carried out with 2.

AB - The syndiotactic polymerizations of styrene are carried out with dinuclear titanocenes such as tetramethyldisiloxanediylbis(cyclopentadienyltitanium trichloride), Cl3Ti-CpSi(CH3)2-O-Si(CH3) 2-Cp-TiCl3 (1), hexamethyltriSiloXanediylbis(cyclopentadienyltitanium trichloride), Cl3Ti-CpSi(CH3)2-O-Si(CH3) 2-O-Si(CH3)2Cp-TiCl3 (2) and hexamethyltrisiloXanediylbis(dicyclopentadienyltitanium dichloride), Cl2CpTi-CpSi(CH3)2-O-Si-(CH3) 2-O-Si(CH3)2Cp-TiCpCl2 (3) in the presence of modified methylaluminoxane (MMAO). Although the catalyst activity of dinuclear titanocenes is lower than that of the corresponding mononuclear titanocenes CpTiCl3 and Cp2TiCl2, the former produce polystyrene of higher weight-average molecular weight and higher syndiotactic index than the latter. Among the dinuclear titanocenes examined, 2 has the largest catalyst activity. In addition, the copolymerizations of styrene and ethylene are carried out with 2.

UR - https://www.scopus.com/pages/publications/0031526597

U2 - 10.1002/masy.19971180118

DO - 10.1002/masy.19971180118

M3 - Article

AN - SCOPUS:0031526597

SN - 1022-1360

VL - 118

SP - 129

EP - 134

JO - Macromolecular Symposia

JF - Macromolecular Symposia

ER -

Syndiospecific polymerizations of styrene with siloxane-bridged dinuclear titanocenes and MAO catalyst systems

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