Stereospecific polymerization of isoprene with Nd(BH4)3(THF)3/MgBu2 as catalyst

被引：70

作者：

Bonnet, F ^{[1
]}

Visseaux, M ^{[1
]}

Pereira, A ^{[1
]}

Bouver, F ^{[1
]}

Barbier-Baudry, D ^{[1
]}

机构：

[1] Univ Bourgogne, CNRS, UMR 5188, LSEO, F-21078 Dijon, France

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2004年 / 25卷 / 08期

关键词：

borohydride; catalysis; lanthanide; polyisoprene; stereospecific polymers;

D O I：

10.1002/marc.200300289

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The neodymium trisborohydride Nd(BH4)(3)(THF)(3) (THF=tetrahydrofuran) has been used as a catalyst precursor for isoprene polymerization for the first time. Associated to an excess of Al(Et)(3), the resulting catalyst is moderately active, giving a mixture of cis- and trans- polymer. Addition of a stoichiometric amount of MgBu2 to Nd(BH4)(3)(THF)(3) affords a stereospecific catalyst providing trans-1,4-polyisoprene, more than 96% regular. That dual component Nd/Mg system also shows a better efficiency and good control of the molecular weights. A molecular structure is tentatively attributed to a bimetallic active species, based on H-1 NMR experiments.

引用

页码：873 / 877

页数：5

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