Determination of addition and fragmentation rate coefficients in RAFT polymerization via time-resolved ESR spectroscopy after laser pulse initiation

被引：41

作者：

Buback, M ^{[1
]}

Hesse, P ^{[1
]}

Junkers, T ^{[1
]}

Vana, P ^{[1
]}

机构：

[1] Univ Gottingen, Inst Phys Chem, D-37077 Gottingen, Germany

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2006年 / 27卷 / 03期

关键词：

ESR/EPR; kinetics (polym.); laser-induced polymerization; reversible addition fragmentation chain transfer (RAFT);

D O I：

10.1002/marc.200500716

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 method for simultaneous determination of both the addition and fragmentation rate coefficients of the RAFT equilibrium reactions is presented, which is based on laser single pulse initiation in conjunction with microsecond time-resolved ESR spectroscopy. The build-up and subsequent decay in concentration of the intermediate radical are measured and k(ad) and k(beta) values are deduced from fitting the concentration versus time profiles to simple kinetic models.

引用

页码：182 / 187

页数：6

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