Silyl Radical Chemistry and Conventional Photoinitiators: A Route for the Design of Efficient Systems

被引：30
作者：
Lalevee, J. [1 ]
Blanchard, N. [2 ]
Chany, A. C. [2 ]
El-Roz, M. [1 ]
Souane, R. [1 ]
Graff, B. [1 ]
Allonas, X. [1 ]
Fouassier, J. P. [1 ]
机构：
[1] Univ Haute Alsace, CNRS, Dept Photochem, ENSCMu, F-68093 Mulhouse, France
[2] Univ Haute Alsace, CNRS, Dept Organ & Bioorgan Chem, ENSCMu, F-68093 Mulhouse, France
来源：
MACROMOLECULES | 2009年 / 42卷 / 16期
关键词：
ACYLGERMANE-BASED PHOTOINITIATOR; ELECTRON-SPIN-RESONANCE; PHOTOCLEAVABLE STRUCTURES; VISIBLE-LIGHT; CATIONIC PHOTOPOLYMERIZATION; CLEAVABLE PHOTOINITIATORS; FUNCTIONAL-GROUPS; POLYMERIZATION; REACTIVITY; MACROPHOTOINITIATORS;
D O I：
10.1021/ma901003h
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Three new efficient photoinitiators (PI) based on a well-known chromophore skeleton (hydroxyphenylacetophenone, thioxanthone, or benzoin) linked to a silyl-containing moiety are proposed. The ability of these structures to initiate both free radical polymerization and free radical promoted cationic polymerization is investigated. A comparison with parent compounds is provided. High rates of polymerization and high final conversions are obtained. These PI directly generate silyl radicals under light irradiation as characterized by ESR spin-trapping. The analysis of the excited-state processes through laser flash photolysis and quantum molecular calculations allow to explain the observed photochemical behavior. The present results evidence the high potential of these new modified PI.
引用
收藏
页码：6031 / 6037
页数：7
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