Utility of a ruthenium metathesis catalyst for the preparation of end-functionalized polybutadiene

被引:166
作者
Hillmyer, MA [1 ]
Nguyen, ST [1 ]
Grubbs, RH [1 ]
机构
[1] CALTECH,ARNOLD & MABEL BECKMAN LABS CHEM SYNTHESIS,DIV CHEM & CHEM ENGN,PASADENA,CA 91125
关键词
D O I
10.1021/ma961316n
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 polymerization of cyclooctadiene (GOD) in the presence of an allylic difunctionalized chain transfer agent (1) by a ruthenium metathesis catalyst (Ru) was accomplished. Deprotection of the resulting acetate end-functionalized polybutadiene was performed, leading to commercially important 1,4-hydroxytelechelic polybutadiene (HTPBD) with number average functionalities close to 2.0. The polymerizations were performed at high monomer concentrations or in the absence of solvent, and the robust nature of Ru allowed the use of high monomer to catalyst ratios (similar to 0.01 mol % Ru relative to total olefin). Investigation of the metathesis of olefin alcohols with Ru showed that side reactions may complicate the use of these compounds as chain transfer agents in metathesis polymerizations. The kinetics of this Ru-catalyzed ring-opening metathesis polymerization with added chain transfer agent was also investigated.
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页码:718 / 721
页数:4
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