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Effects of Temperature on Properties of Ormosils

Published online by Cambridge University Press:  10 February 2011

J. D. Mackenzie ,
Q. Huang ,
F. Rubio-Alonso  and
S. J. Kramer
J. D. Mackenzie
Affiliation:
Department of Materials Science and Engineering, University of California Los Angeles, CA 90095-1595, jdmac@seas.ucla.edu
Q. Huang
Affiliation:
Department of Materials Science and Engineering, University of California Los Angeles, CA 90095-1595, jdmac@seas.ucla.edu
F. Rubio-Alonso
Affiliation:
Department of Materials Science and Engineering, University of California Los Angeles, CA 90095-1595, jdmac@seas.ucla.edu
S. J. Kramer
Affiliation:
Department of Materials Science and Engineering, University of California Los Angeles, CA 90095-1595, jdmac@seas.ucla.edu
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Abstract

Organically modified silicates, the so-called Ormosils, based on silica (SiO2) and polydimethylsiloxane (PDMS), can have wide variations of mechanical properties depending on their chemical compositions and processing variables. The random network of the SiO2 is structurally modified by the reactive incorporation of PDMS chains to give materials ranging from hard glassy solids with Vickers number up to 200 Kg/mm2 to rubbery solids with resilience in excess of 75%. The variations of strength, elastic modulus and mechanical damping with temperature have been studied. The chemical stability of rubbery Ormosils as a function of temperature has been measured in air and in nitrogen. Examples of potential applications are presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 435: Symposium V – Better Ceramics Through Chemistry VII , 1996 , 229
Copyright
Copyright © Materials Research Society 1996

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