Abstract
A hybrid organic-inorganic material was prepared from the hydrolytic co-condensation of 3-trimethoxysilylpropylmethacrylate (MAPTMS) and diphenyldiethoxysilane (DPHDES). The synthesis was performed in three steps: (1) MAPTMS pre-hydrolysis, (2) addition of DPHDES, and (3) further hydrolysis of the obtained mixture. 29Si nuclear magnetic resonance spectroscopy was used to characterise the structural evolution of the mineral network during the synthesis. It revealed the catalytic effect of DPHDES on the condensation reaction of silanol groups, initially observed for pre-hydrolysed MAPTMS. In addition, it was clearly demonstrated that the formation of the highest condensed species of the aromatic oligomers (D2 species) occurred only in the presence of aliphatic oligomers, which decrease the sterical hindrance about the silicon nuclei.
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Oubaha, M., Dubois, M., Murphy, B. et al. Structural characterisation of a sol-gel copolymer synthesised from aliphatic and aromatic alkoxysilanes using 29Si-NMR spectroscopy. J Sol-Gel Sci Technol 38, 111–119 (2006). https://doi.org/10.1007/s10971-006-7114-7
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DOI: https://doi.org/10.1007/s10971-006-7114-7