Preparation of syndiotactic polystyrene using novel monotitanocene with ortho-substituted phenoxy ligands

Preparation of syndiotactic polystyrene using novel monotitanocene with ortho-substituted phenoxy ligands

Four new Cp*Ti compounds with ortho-substituted phenoxy ligands for the syndio- specific polymerization of styrene were prepared by the reaction of various kinds of ortho- substituted phenol with Cp*TiCl3 in the presence of triethylamine. Their catalytic properties for syndiospecific polymerization...

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Bibliographic Details
Main Authors: Zhang Ling, Xiao Shanshan, Huang Shaowen, Zhu Fangming, Wu Qing
Format: Article
Language:English
Published: De Gruyter 2013-08-01
Series:e-Polymers
Online Access:https://doi.org/10.1515/epoly.2013.2013.1.293
Description
Summary:Four new Cp*Ti compounds with ortho-substituted phenoxy ligands for the syndio- specific polymerization of styrene were prepared by the reaction of various kinds of ortho- substituted phenol with Cp*TiCl3 in the presence of triethylamine. Their catalytic properties for syndiospecific polymerization of styrene were investigated at different AlMAO/Ti ratio, different AlTIBA/Ti ratio and different polymerization temperature. All four compounds in the presence of cocatalyst methylaluminoxane (MAO) and triisobutylaluminum (TIBA) showed good performance at lower concentrations of titanium, MAO, and TIBA. Especially, ( Cp*Ti(OPhMe)3)/MAO system afforded syndiotactic polystyrene (sPS) with the highest activity and high molecular weight
ISSN:1618-7229

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