New highly efficient radical photoinitiators based on si-si bond cleavage

被引：45

作者：

Lalevee, J. ^{[1
]}

El-Roz, M. ^{[1
]}

Morlet-Savary, F. ^{[1
]}

Graff, B. ^{[1
]}

Allonas, X. ^{[1
]}

Fouassier, J. P. ^{[1
]}

机构：

[1] Univ Haute Alsace, CNRS, Dept Photochem, ENSCMu,UMR 7525, F-68093 Mulhouse, France

来源：

MACROMOLECULES | 2007年 / 40卷 / 24期

关键词：

D O I：

10.1021/ma071489k

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Two Si-Si bond based photoinitiators that differ by their methyl versus phenyl substituents, were investigated to measure the reactivity of the silyl radicals. The Si-Si based structures, (10,10'-bis-(10-phenyl-10H-phenoxasilin) PI-1 and 9,9' -dimethyl-9,9' -bis-(9H-9-silafluorene) PI-2) were selected and through steady-state experiments, laser flash photolysis and quantum mechanical calculations. The photopolymerization ability of these photoinitiators was evaluated and compared to type I photoinitiator DMPA. Along with this the reactivity of the silyl radicals was also investigated and a mechanism for the initiation step was proposed. Nanosecond laser flash photolysis (LFP) experiments were done using Q-switched nanosecond Nd/YAG laser. As a result it was found that the reactivity of these new photoinitiators was higher than that of DMPA and they have promising potential which can increase further.

引用

页码：8527 / 8530

页数：4

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