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A Simple Method for the Reinforcement of UV‐Cured Coatings via Sol‐Gel Photopolymerization |
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| Authors: | Cindy Belon Abraham Chemtob Céline Croutxé‐Barghorn Séverinne Rigolet Vincent Le Houérou Christian Gauthier |
| Affiliation: | 1. Département de Photochimie Générale, CNRS, ENSCMu, University of Haute‐Alsace, 3 rue Alfred Werner 68093 Mulhouse Cedex, France;2. Institut de Science des Matériaux de Mulhouse, CNRS, LRC 7228, University of Haute‐Alsace, 3 rue Alfred Werner 68093 Mulhouse Cedex, France;3. Institut Charles Sadron, CNRS, UPR 22, University of Strasbourg, 23 Rue du Loess, BP 84047, 67034 Strasbourg Cedex 2, France |
| Abstract: | A difunctional methacrylate oligomer was mixed with a variable amount of a MAPTMS precursor in the presence of both a radical and a cationic photoinitiator. The simultaneous photolysis of both photosensitive molecules upon UV irradiation allowed the single‐step generation of a type‐II polymethacrylate/polysiloxane nanocomposite film. Methacrylate and methoxysilyl conversions during irradiation were efficiently monitored by FTIR spectroscopy. The inorganic structure of the resulting silica‐based hybrid films was characterized using 29Si solid‐state NMR. Finally, the reinforcement ability of the resulting hybrid films was also assessed by using a unique range of characterization techniques: DMA, scratch test, and nanoindentation.  |
| Keywords: | mechanical properties nanocomposites photopolymerization reinforcement sol‐gel process |