In situ bidentate to tetradentate ligand exchange reaction in cobalt-mediated radical polymerization

被引：16

作者：

Kermagoret, Anthony ^{[1
]}

Jerome, Christine ^{[1
]}

Detrembleur, Christophe ^{[1
]}

Debuigne, Antoine ^{[1
]}

机构：

[1] Univ Liege ULg, Dept Chem, CERM, B-4000 Liege, Belgium

来源：

EUROPEAN POLYMER JOURNAL | 2015年 / 62卷

关键词：

Organometallic-mediated radical polymerization (OMRP); Cobalt-mediated radical polymerization (CMRP); Vinyl acetate; Acrylate; Block copolymers; VINYL-ACETATE; DEGENERATIVE TRANSFER; BLOCK-COPOLYMERS; VERSATILE ROUTE; KEY ROLE; COMPLEXES; CATALYSTS; DESIGN; STYRENE; ACRYLATES;

D O I：

10.1016/j.eurpolymj.2014.08.003

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Organometallic-mediated radical polymerization (OMRP) has seen a significant growth in the last years notably due to the development of new metal complexes, especially cobalt derivatives. Despite of this, none of the reported complexes offers optimal control for monomers with very different reactivity, which somewhat limits the synthesis of copolymers. In order to expand the scope of cobalt-mediated radical polymerization (CMRP), we investigated an in situ ligand exchange reaction for modulating the properties of the cobalt complex at the polymer chain-end and adjusting the C-Co bond strength involved in the control process. With the aim of improving the synthesis of poly(vinyl acetate)-b-poly (n-butyl acrylate) copolymers, bidentate acetylacetonate ligands, which impart high level of control to the polymerization of vinyl acetate (VAc), were replaced in situ at the PVAc cobalt chain-end by tetradentate Salen type ligands that are more suited to acrylates. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：312 / 321

页数：10

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