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Preparation and Characterization of Hybrid Nanocomposite Coatings by Cationic UV‐Curing and the Sol‐Gel Process of a Vinyl Ether Based System |
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| Authors: | Marco Sangermano Ezio Amerio Paolo Epicoco Aldo Priola Giancarlo Rizza Giulio Malucelli |
| Affiliation: | 1. Dipartimento di Scienza dei Materiali e Ingegneria Chimica, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Torino, ItalyDipartimento di Scienza dei Materiali e Ingegneria Chimica, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy.;2. Dipartimento di Scienza dei Materiali e Ingegneria Chimica, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy;3. Laboratoires des Solides Irradies, Ecole Polytechnique/CEA (DSM‐DRECAM)/CNRS (UMR 7642), 91128 Palaiseau Cedex, France |
| Abstract: | Organic/inorganic hybrid nanocomposite coatings were prepared through a dual‐cure process involving the cationic photopolymerization of a vinyl ether based system and the condensation of an alkoxysilane inorganic precursor. All formulations produced transparent cured films characterized by high gel contents. An increase in glass transition temperature and an increase in storage modulus above Tg in the rubbery plateau were observed with increasing TEOS content in the photocurable formulation. TEM micrographs showed that the organic and inorganic phases were strictly interconnected with no macroscopic phase separation; the sizes of the silica domains in the polymeric matrix were 3–5 nm.  |
| Keywords: | cationic photopolymerization hybrid organic/inorganic nanocomposites sol‐gel process vinyl ether monomer |