Synthesis and Properties of Inorganic/Organic Hybrid Gels by the Sol-Gel Process
The preparation of inorganic/organic hybrid gels was carried out using tetraethoxysilane and organic polymers via the sol-gel process. Hydroxyl terminated siloxane polymers were reactive enough to be incorporated into the silica networks. However, hydroxyl terminated organic polyethers, i.e., poly(oxyethylene), poly(oxypropylene), and poly(oxy-tetramethylene), failed to react, thus most of them were extracted by organic solvents. The introduction of triethoxysilyl groups in these polymers was found very effective to prepare truly hybrid gels by the sol-gel process. The resulted gels were optically transparent and mechanically more or less elastic. The structures and mechanical properties of these flexible materials were investigated. The organic polymer or silica glass formed the matrix depending on the composition of the gel, and the other component dispersed in the matrix. Dynamic mechanical properties of the flexible gels in which organic polymers were predominant components, were explained in accord with the structural considerations. Noise and vibration attenuating materials are suggested as one of the possible applications of these gels from their mechanical loss behaviors.
KeywordsOrganic Polymer Dynamic Mechanical Property Silica Network Temperature Dispersion Inorganic Glass
Unable to display preview. Download preview PDF.
- 5.S. Sakka, Am. Ceram. Soc. Bull., 64 (1985) 1463.Google Scholar
- 7.L.L. Hench and D.R. Ulrich eds., Science of Ceramic Chemical Processing, John Wiley & Sons, New York, 1985.Google Scholar
- 8.S. Sakka, Science of Sol-Gel Process, Agune-Shofusha, Tokyo, 1988 (in Japanese).Google Scholar
- 9.D.R. Ulrich, Chemtech, 18 (1988) 242.Google Scholar
- 11.H.H. Huang, B. Orler and G.L. Wilkess, Polym. Bull. 14 (1985)Google Scholar
- 18.H.H. Huang, G.L. Wilkes, J.G. Carlson, Polymer. 30 (1989) 2001Google Scholar
- 19.M. Fujita, K. Honda, Polym. Comun., 30 (1989) 200.Google Scholar
- 20.F. P. Baldwin, A. Malatesta (Esso Research and Engineering Co.) U. S. Patent 3366612 (1968); Chem. Abstr., 68, 60386u (1968).Google Scholar
- 21.H. V. Voight, Kautsch. Gummi Kunst., 29, 17 (1976).Google Scholar
- 23.J.E. Mark, in ref. 7), p.434.Google Scholar
- K. Kajiwara, S. Kabjiya, M. Shibayama, H. Urakawa, “Characterization of Gel Structure by Means of SAXS and SANS” in this bookGoogle Scholar