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

作者：Belon Cindy; Chemtob Abraham; Croutxe Barghorn Celine^*; Rigolet Severinne; Le Houerou Vincent; Gauthier Christian

来源：Macromolecular Materials and Engineering, 2011, 296(6): 506-516.

DOI：10.1002/mame.201000350

• mechanical properties
• nanocomposites
• photopolymerization
• reinforcement
• sol-gel process

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.

• 出版日期2011-6-16