Effect of cocatalysts on the catalytic activities of tantalum- and niobium-based catalysts for ring-opening metathesis polymerization of norbornene

被引：13
|
作者：
Nakayama, Yuushou [1 ]
Tanimoto, Masaya [1 ]
Shiono, Takeshi [1 ]
机构：
[1] Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Hiroshima 7398527, Japan
来源：
MACROMOLECULAR RAPID COMMUNICATIONS | 2007年 / 28卷 / 05期
关键词：
catalysis; metal-organic catalysts/organometallic catalysts; ring-opening metathesis polymerization (ROMP);
D O I：
10.1002/marc.200600712
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 series of pentavalent tantalum and niobium complexes with aryloxy ligands was prepared, and their catalytic behavior for the ROMP of norbornene was studied in the presence of an alkylaluminum cocatalyst. Tantalum complexes 1-4 showed very high activity for the ROMP of NBE in combination with (Bu3Al)-Bu-i to give high-molecular-weight polymers. In contrast, the niobium complexes 5 and 6, as well as NbCl5, exhibited very high activity upon activation with Me3Al to give high-molecular-weight polymers.
引用
收藏
页码：646 / 650
页数：5
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