A NOVEL TITANIUM COMPLEX WITH LINKED β-DIKETONATO-INDENYL LIGAND FOR CATALYTIC SYNDIOSPECIFIC POLYMERIZATION OF STYRENE*

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A NOVEL TITANIUM COMPLEX WITH LINKED β-DIKETONATO-INDENYL LIGAND FOR CATALYTIC SYNDIOSPECIFIC POLYMERIZATION OF STYRENE*

Papers | Updated：2021-06-21

- A NOVEL TITANIUM COMPLEX WITH LINKED β-DIKETONATO-INDENYL LIGAND FOR CATALYTIC SYNDIOSPECIFIC POLYMERIZATION OF STYRENE*
- Vol. 20, Issue 3, Pages: 213-217(2002)
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- Published：20 June 2002
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A NOVEL TITANIUM COMPLEX WITH LINKED β-DIKETONATO-INDENYL LIGAND FOR CATALYTIC SYNDIOSPECIFIC POLYMERIZATION OF STYRENE*[J]. 2002, 20(3): 213-217.
DOI：

A NOVEL TITANIUM COMPLEX WITH LINKED β-DIKETONATO-INDENYL LIGAND FOR CATALYTIC SYNDIOSPECIFIC POLYMERIZATION OF STYRENE*[J]. 2002, 20(3): 213-217. DOI：

摘要

A novel ligand (3)

in which the indenyl group is linked to a β-diketone moiety through a three-carbon bridge

andits titanium complex (4) were synthesized. The titanium complex was employed as a metallocene analog with co-catalystmethylaluminoxane (MAO) in catalytic syndiospecific polymerization of styrene to give highly syndiotactic polystyrene(s-PS

96%-97%). Polymerization temperature (Tp) strongly influenced the catalytic activity and syndiotacticity of theproduced PS. The activities of catalyst 4 increase from 1.84×106 to 3.26 ×106 gPS/molTi ·h with the increase of Tg from 60℃ to 80℃ and the syndiotacticities of the produced s-PS also increase slightly.Then

both the catalytic activity and the syndiotacticity of PS decrease at Tp of 90℃.

Abstract

A novel ligand (3)

in which the indenyl group is linked to a β-diketone moiety through a three-carbon bridge

both the catalytic activity and the syndiotacticity of PS decrease at Tp of 90℃.

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