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A Simple Method for the Reinforcement of UV‐Cured Coatings via Sol‐Gel Photopolymerization
Author(s) -
Belon Cindy,
Chemtob Abraham,
CroutxéBarghorn Céline,
Rigolet Séverinne,
Le Houérou Vincent,
Gauthier Christian
Publication year - 2011
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201000350
Subject(s) - materials science , photoinitiator , photopolymer , cationic polymerization , methacrylate , nanocomposite , fourier transform infrared spectroscopy , chemical engineering , polymer chemistry , hybrid material , sol gel , oligomer , composite material , polymer , polymerization , nanotechnology , monomer , engineering
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.