A Simple Method for the Reinforcement of UV-Cured Coatings via Sol-Gel Photopolymerization

✍ Scribed by Cindy Belon; Abraham Chemtob; Céline Croutxé-Barghorn; Séverinne Rigolet; Vincent Le Houérou; Christian Gauthier

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 734 KB
• Volume: 296
• Category: Article
• ISSN: 1438-7492
• DOI: 10.1002/mame.201000350

✦ Synopsis

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 ^29^Si 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. magnified image