Improving the Behavior of Bis(phenoxyamine) Group 4 Metal Catalysts for Controlled Alkene Polymerization

被引：42

作者：

Cipullo, Roberta ^{[1
]}

Busico, Vincenzo ^{[1
,2
]}

Fraldi, Natascia ^{[1
,2
]}

Pellecchia, Roberta ^{[1
,2
]}

Talarico, Giovanni ^{[1
]}

机构：

[1] Univ Naples Federico II, Dipartimento Chim Paolo Corradini, I-80126 Naples, Italy

[2] DPI, NL-5600 AX Eindhoven, Netherlands

来源：

MACROMOLECULES | 2009年 / 42卷 / 12期

关键词：

PROPENE POLYMERIZATION; BLOCK-COPOLYMERS; ISOTACTIC POLYPROPYLENE; OLEFIN POLYMERIZATION; COMPLEXES; HOMOPOLYMERS; STRENGTHS; HYDROGEN; LIGANDS;

D O I：

10.1021/ma9006957

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A study was conducted to improve the behavior of bis(phenoxyamine) group 4 metal catalysts for controlled alkene polymerization. The performance of bis(phenoxyamine)Hf homologues was investigated, assuming that a higher chain propagation to transfer ratio was associated with a longer duration of the controlled regime. The bis(phenoxyamine)Hf-dibenzyl complexes Hf-1 and Hf-2 were prepared similarly to the Zr-1 and Zr-2 Hf homologues. The complexes were activated with methylalumoxane (MAO) in combination with 2,6-di-tert-bytylphenol (TBP) to scavenge free trimethylaluminum and inhibit chain transfer through trans-alkylation. The complexes were also tested comparatively with Zr-1 and Zr-2 in ethene and propene polymerization at 25 °C in toluene solution.

引用

页码：3869 / 3872

页数：4

共 32 条

[1] Polypropylene "chain shuttling" at enantiomorphous and enantiopure catalytic species: Direct and quantitative evidence from polymer microstructure [J].