Abstract
Many organically modified silicates (ormosils) can be prepared by the sol-gel method with very different mechanical properties by varying the ratio of polydimethylsiloxane (PDMS) to tetraethoxysilane (TEOS) contents and processing conditions. With a low PDMS concentration, the ormosils are harder, stiffer and stronger than those with higher concentration of PDMS. Even harder ormosils are possible when ultrasonic irradiation is used during synthesis. As the PDMS concentration is increased, the ormosils take on a more flexible nature, and over a critical concentration actually become rubbery. These new rubbery materials can contain as much as 75% inorganic components, and have more stable mechanical properties than commercial rubbers at elevated temperatures. Effects of PDMS addition to the network structure and mechanical properties of the ormosils were investigated.
Similar content being viewed by others
References
G.Philipp and H.Schmidt, J. Non-Cryst. Solids 63, 283 (1984).
G.L.Wilkes, B.Orler, and H.Huang, Polym. Prepr. 26, 300 (1985).
Y.J.Chung, S.J.Ting, and J.D.Mackenzie, in Better Ceramics Through Chemistry IV, edited by B.J.J.Zelinski, C.J.Brinker, D.E.Clark, and D.R.Ulrich (Elsevier, New York, 1990), p. 981.
Y.Hu and J.D.Mackenzie, in Better Ceramics Through Chemistry V, edited by M.J.Hampden-Smith, W.G.Klemperer, and C.J.Brinker (Elsevier, New York, 1992), p. 681.
Y.Hu and J.D.Mackenzie J. Mater. Sci. 27, 4415 (1992).
J.D.Mackenzie, Y.J.Chung, and Y.Hu, J. Non-Cryst. Solids 147 & 148, 271 (1992).
T.Iwamoto, K.Morita and J.D.Mackenzie, J. Non-Cryst. Solids 159, 65 (1993).
Y.Hu and J.D.Mackenzie, J. Mater. Sci. 28, 6549 (1993).
K.Morita, Y.Hu, and J.D.Mackenzie, in Better Ceramics Through Chemistry V, edited by M.J.Hampden-Smith, W.G.Klemperer, and C.J.Brinker (Elsevier, New York, 1992), p. 693.
K.Morita, Y.Hu, and J.D.Mackenzie, J. Sol-Gel Sci. and Tech. 3, 109 (1994).
T.Iwamoto and J.D.Mackenzie, in Better Ceramics Through Chemistry VI, edited by A.K.Cheetham, C.J.Brinker, M.L.Mecartney, and C.Sanchez (Elsevier, New York, 1994), p. 397.
T.Iwamoto and J.D.Mackenzie, J. Sol-Gel Sci. and Tech. 4, 1 (1995).
W.H.Zachariasen, J. Am. Chem. Soc. 54, 384 (1932).
M.Imaoka, H.Hasegawa, Y.Hamaguchi, and Y.Kurotaki, Yogyo Kyokaishi 79, 164 (1971).
L.Ainworth, J. Soc. Glass Tech. 38, 501 (1954).
B.R.Lawn and D.B.Marshall, J. Am. Ceram. Soc. 62, 347 (1979).
G.R.Anstis, P.Chantikul, B.R.Lawn, and D.P.Marshall, J. Am. Ceram. Soc. 64, 533 (1981).
J.F.Shackelford, Introduction to Materials Science for Engineers, 3rd ed. (Macmillan, New York, 1992).
Degussa Corporation, Aerosil-Fumed Silica Technical Brochure.
G. Minervini, Tensile Properties of Rubbery Organically Modified Silicates, Master Thesis, University of California, Los Angeles, 1994.
F.A.McClintock and A.S.Argon, Mechanical Behavior of Materials (Addison-Wesley Publishing Co., Reading, Massachusetts, 1966).
P.M. Morse, Vibration and Sound (The American Institute of Physics, 1986).
B.J.Lazam, Damping of Materials and Members in Structural Mechanics (Pergamon Press, New York, 1968).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Mackenzie, J.D., Huang, Q. & Iwamoto, T. Mechanical properties of ormosils. J Sol-Gel Sci Technol 7, 151–161 (1996). https://doi.org/10.1007/BF00401034
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00401034