Abstract
Composites of poly(dimethylsiloxane) (PDMS) with silica and silica-titania mixed oxides have been successfully prepared using the sol–gel hydrolysis and condensation of tetraethoxysilane (TEOS). In the study of the hydrolysis and sol–gel transition reaction, it was found that co-condensation between TEOS and PDMS was the dominant reaction under the chosen conditions, and that most of the PDMS was thereby incorporated in the SiO2 network. The presence of PDMS during the sol–gel reaction was found to greatly shorten the gelation time of the system. The most striking change in mechanical properties of composites with high inorganic content is the marked improvement in impact strength, arising from the existence of energy-absorbing ductile processes. In the case of high PDMS content, the thermal stability of polymer can be improved by the presence of the in-situ precipitated ceramic phases.
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Wen, J., Mark, J. Sol–Gel Preparation of Composites of Poly(dimethylsiloxane) with SiO2 and SiO2/TiO2, and Their Mechanical Properties. Polym J 27, 492–502 (1995). https://doi.org/10.1295/polymj.27.492
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DOI: https://doi.org/10.1295/polymj.27.492
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