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Combination of transition metal carbonyls and silanes: New photoinitiating systems |
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| Authors: | Mohamad‐Ali Tehfe Jacques Lalevée Didier Gigmes Jean Pierre Fouassier |
| Affiliation: | 1. Department of Photochemistry, CNRS, University of Haute Alsace, Ecole Nationale Supérieure de Chimie de Mulhouse, 3 rue Alfred Werner, Mulhouse 68093, Cedex, France;2. UMR 6264 Laboratoire Chimie Provence, Université de Provence, Avenue Escadrille Normandie‐Niemen, Case 542, Marseille 13397, Cedex 20, France |
| Abstract: | The recently developed silyl radical chemistry is used in combination with transition metal carbonyls MC (dimanganese(0) decacarbonyl; dirhenium decacarbonyl; cyclopentadienyl iron(II) dicarbonyl dimer) for both free radical promoted cationic photopolymerization (FRPCP) and free radical photopolymerization (FRP). The newly developed photoinitiating systems (MC/silane and MC/silane/iodonium salt) are highly efficient under air. Photopolymerization profiles obtained upon a visible light irradiation delivered by a xenon lamp show that high conversion can be easily achieved after a 400 s exposure. Sunlight irradiations under air can also lead to tack free coatings. The processes associated with the metal carbonyl radical/silane interactions are investigated by Laser Flash Photolysis (LFP) and ESR‐Spin Trapping (ESR‐ST) experiments. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 1830–1837, 2010 |
| Keywords: | cationic photopolymerization FTIR photopolymerization radical photopolymerization silanes transition metal carbonyls |