Concomitant Organic−Inorganic UV-Curing Catalyzed by Photoacids

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• 作者：Abraham Chemtob ; Davy-Louis Versace ; Cindy Belon ; Cé ; line Croutxé ; -Barghorn ; Sé ; verinne Rigolet
• 刊名：Macromolecules
• 出版年：2008
• 出版时间：October 28, 2008
• 年：2008
• 卷：41
• 期：20
• 页码：7390-7398
• 全文大小：459K
• 年卷期：v.41,no.20(October 28, 2008)
• ISSN：1520-5835

文摘

Organic−inorganic UV-curing of organosilanes containing epoxy and trialkoxysilyl functional groups in the same monomer was implemented using a diaryl iodonium salt as cationic photoinitiator. UV-generated Brönsted acids through photolytic degradation were found to be effective in catalyzing both epoxy ring-opening polymerization and alkoxysilane sol−gel polycondensation reactions. Competition between the formation of inorganic and organic phases was kinetically studied using real-time Fourier transform infrared spectroscopy (RT-FTIR). The nature of the hybrid monomer, the effect of changing the film thickness, the type of substrate and the influence of laminated conditions on the polymerization kinetics were assessed. ²⁹Si and ¹³C solid state NMR measurements were also performed to investigate the structure of the UV-cured hybrid materials.