Syndiospecific Styrene Polymerization and Ethylene/Styrene Copolymerization Using Half-Titanocenes: Ligand Effects and Some New Mechanistic Aspects

被引：19

作者：

Nomura, Kotohiro ^{[1
,2
]}

机构：

[1] Nara Inst Sci & Technol, Grad Sch Mat Sci, Nara 6300101, Japan

[2] Tokyo Metropolitan Univ, Dept Chem, Tokyo 1920397, Japan

来源：

CATALYSIS SURVEYS FROM ASIA | 2010年 / 14卷 / 01期

基金：

日本学术振兴会;

关键词：

Olefin polymerization; Homogeneous catalysis; Titanium; Styrene; Ethylene; Methylaluminoxane (MAO); Catalytically active species; OLEFIN POLYMERIZATION; SYNDIOTACTIC POLYMERIZATION; LIVING COPOLYMERIZATION; METALLOCENE COMPLEXES; ALKENE POLYMERIZATION; CATALYST SYSTEM; CYCLOPENTADIENYL; INSERTION; TITANIUM; HOMOPOLYMERIZATION;

D O I：

10.1007/s10563-010-9086-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ethylene/styrene copolymerization catalyzed by half-titanocenes [Cp'TiX3 (Cp' = cyclopentadienyl; X = halogen, alkyl etc.), linked half-titanocenes, and modified half-titanocenes expressed as Cp'TiX2(Y) (Y = anionic donor ligand)] have been reviewed. Results in the syndiospecific styrene polymerization using Cp'TiX2(Y)-MAO catalysts have also been summarized. The activity and molecular weight in the resultant (co)polymer (and styrene incorporation) are highly affected by ligand (Cp' and Y). It has been suggested that the cationic Ti(IV) plays a role in the copolymerization whereas the neutral Ti(III) plays a role in the homopolymerization.

引用

页码：33 / 49

页数：17

共 117 条

[1] COPOLYMERIZATION OF STYRENE AND ETHYLENE WITH MONOCYCLOPENTADIENYLTITANIUM TRICHLORIDE METHYLALUMINOXANE CATALYST - CHARACTERIZATION OF THE PRODUCT [J].