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Gel-melting method for preparation of organically modified siloxane low-melting glasses

Published online by Cambridge University Press:  03 March 2011

Hirokazu Masai ,
Masahide Takahashi ,
Yomei Tokuda  and
Toshinobu Yoko
Hirokazu Masai
Affiliation:
Institute for Chemical Research, Kyoto University, Kyoto 611-0011, Japan
Masahide Takahashi*
Affiliation:
Institute for Chemical Research, Kyoto University, Kyoto 611-0011, Japan; and PRESTO, Japan Science and Technology Agency, Saitama 332-0012, Japan
Yomei Tokuda
Affiliation:
Institute for Chemical Research, Kyoto University, Kyoto 611-0011, Japan
Toshinobu Yoko
Affiliation:
Institute for Chemical Research, Kyoto University, Kyoto 611-0011, Japan
*
a)Address all correspondence to this author. e-mail: masahide@noncry.kuicr.kyoto-u.ac.jp
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Abstract

Softening or melting behavior of the organically-modified siloxane hybrid gels and glasses in the system of RSiO3/2 and R2SiO2/2 (R: methyl and phenyl) has been investigated to obtain a new family of low-melting glasses. The RSiO3/2 and RSiO3/2–R2SiO2/2 gels showed softening temperatures around 50–100 °C. The softening temperature of RSiO3/2 single-component glasses, which were obtained by melting the corresponding gels at a temperature above the softening temperature, increased by heat-treatment at 200 °C, and finally showed no softening behavior. On the other hand, in the PhSiO3/2–Ph2SiO2/2 binary glasses, the softening temperatures showed a tendency to saturate after longer heat treatment over 200 h. These facts indicate that the present organically modified siloxane system will be a potential candidate for the low-melting glass.

Keywords

GlassSol-gel
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 5 , May 2005 , pp. 1234 - 1241
Copyright
Copyright © Materials Research Society 2005

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