Efficient dual radical/cationic photoinitiator under visible light: a new concept

被引:169
作者
Lalevee, Jacques [1 ]
Blanchard, Nicolas [2 ]
Tehfe, Mohamad-Ali [1 ]
Peter, Mathieu [1 ]
Morlet-Savary, Fabrice [1 ]
Gigmes, Didier [3 ]
Fouassier, Jean Pierre [1 ]
机构
[1] Univ Haute Alsace, ENSCMu, LPIM Dept Photochem, F-68093 Mulhouse, France
[2] Univ Haute Alsace, ENSCMu, CNRS, Organ & Bioorgan Chem Lab, F-68093 Mulhouse, France
[3] Univ Aix Marseille 1, UMR Lab Chim Prov 6264, F-13397 Marseille 20, France
关键词
CATIONIC-POLYMERIZATION; AERATED MEDIA; ELECTRON; PHOTOPOLYMERIZATION; CHEMISTRY; NETWORKS; RADICALS; KINETICS; SILANE;
D O I
10.1039/c1py00140j
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 new concept based on the photoredox catalysis is proposed for the design of a photoinitiating system able to efficiently generate, in a single catalytic cycle, both a radical and a cation as initiating species. This is exemplified here by the tris(1,10-phenanthroline)ruthenium(II) (Ru(phen)(3)(2+)) complex in combination with a diphenyl iodonium salt and a silane. Interesting and promising photopolymerization profiles in free radical photopolymerization (FRP) and free radical promoted cationic photopolymerization (FRPCP) are obtained under air and upon xenon lamp exposure and even soft irradiation conditions (fluorescence bulb, sunlight). An acrylate/epoxide blend is also easily polymerized under air using a fluorescent bulb. The mechanisms are investigated by ESR and Laser Flash Photolysis experiments.
引用
收藏
页码:1986 / 1991
页数:6
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