Free-radical termination kinetics studied using a novel SP-PLP-ESR technique

被引：84

作者：

Buback, M ^{[1
]}

Egorov, M ^{[1
]}

Junkers, T ^{[1
]}

Panchenko, E ^{[1
]}

机构：

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

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2004年 / 25卷 / 10期

关键词：

ESR/EPR; kinetics (polym.); pulsed-laser polymerization; radical polymerization; termination;

D O I：

10.1002/marc.200400050

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 novel method for measuring termination rate coefficients, k(t), in free-radical polymerization is presented. A single laser pulse is used to instantaneously produce photoinitiator-derived radicals. During subsequent polmerization, radical concentration is monitored by time-resolved electron spin resonance (ESR) spectroscopy. The size of the free radicals, which exhibits a narrow distribution increases linearly with time t, which allows the chain-length dependence of k(t), to be deduced. The method will be illustrated using dodecyl methacrylate polymerization as an example.

引用

页码：1004 / 1009

页数：6

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