Li Ying-Sing, Ba Abdul, Mahmood Maleeha S
University of Memphis, Department of Chemistry, Memphis, TN 38152-3550, USA.
Spectrochim Acta A Mol Biomol Spectrosc. 2009 Apr;72(3):605-9. doi: 10.1016/j.saa.2008.10.055. Epub 2008 Nov 13.
Triacetoxyvinylsilane (TAVS) has been used as a precursor to prepare sol-gel under aqueous conditions. The sol-gel product has been applied for the surface treatment of aluminum. Infrared and Raman spectra have been collected for TAVS and for TAVS sol-gel, xerogel and sol-gel-coated aluminum. Vibrational analyses have been suggested for the recorded spectra based essentially on the group frequencies and the spectral variation with the change of the sol-gel product states and the vibrational assignments of similar molecules. From the recorded infrared and Raman spectra of the sol-gel and xerogel, it is found that the sol-gel produced in the process with TAVS is essentially the same as that prepared from vinyltriethoxysilane. Thermo-gravimetric analysis (TGA) of TAVS xerogel has been conducted, and an explanation has been given in coordination with the results obtained from IR spectroscopic study of the xerogels cured at different temperatures. The study has demonstrated the thermal effect on the condensation of the sol-gel process and on the vinyl decomposition of TAVS xerogel.
三乙酰氧基乙烯基硅烷（TAVS）已被用作在水相条件下制备溶胶 - 凝胶的前驱体。该溶胶 - 凝胶产物已应用于铝的表面处理。已收集了TAVS以及TAVS溶胶 - 凝胶、干凝胶和溶胶 - 凝胶涂覆铝的红外光谱和拉曼光谱。基本上基于基团频率以及随着溶胶 - 凝胶产物状态变化的光谱变化和类似分子的振动归属，对记录的光谱进行了振动分析。从溶胶 - 凝胶和干凝胶的记录红外光谱和拉曼光谱中发现，用TAVS制备的溶胶 - 凝胶与由乙烯基三乙氧基硅烷制备的溶胶 - 凝胶基本相同。对TAVS干凝胶进行了热重分析（TGA），并结合在不同温度下固化的干凝胶的红外光谱研究结果给出了解释。该研究证明了热对溶胶 - 凝胶过程的缩合以及TAVS干凝胶的乙烯基分解的影响。
