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Synthesis and Properties of Chemically Modified Polycarbosilane Containing Organofluoric Groups

Published online by Cambridge University Press:  31 January 2011

Sachiko Okuzaki ,
Yuji Iwamoto ,
Koichi Kikuta  and
Shin-ichi Hirano
Sachiko Okuzaki
Affiliation:
Fine Ceramics Research Association, Synergy Ceramics Laboratory, 2–4-1 Mutsuno Atsuta-ku, Nagoya 456, Japan
Yuji Iwamoto
Affiliation:
Fine Ceramics Research Association, Synergy Ceramics Laboratory, 2–4-1 Mutsuno Atsuta-ku, Nagoya 456, Japan
Koichi Kikuta
Affiliation:
Nagoya University, 1 Furo-cho, Chikusa-ku, Nagoya 464–01, Japan
Shin-ichi Hirano
Affiliation:
Nagoya University, 1 Furo-cho, Chikusa-ku, Nagoya 464–01, Japan
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Abstract

The chemically modified polycarbosilane (PC) containing organofluoric groups, PCOCF, was synthesized through chemical reaction of PC and fluoric alcohol. Pyrolysis of the polymer precursor occurred in three stages under 1000 °C. Weight loss due to evaporation of low molecular compounds was observed at the first stage below 300 °C, followed by the largest weight loss from 300 to 600 °C at the second stage. At this stage, side chains formed during the chemical reaction were removed. Finally, side chains such as Si–CH3 decomposed at the third stage above 600 °C. At 1000 °C, the chemical modification of PC resulted in high yield of solid product. After coating PCOCF on silicon carbide (SiC) powders, the conversion yield of pyrolyzed PCOCF was further improved due to the interaction between PCOCF and SiC powders. Coating of PCOCF on SiC powders was found to be effective in increasing the green density of uniaxially pressed bodies.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 4 , April 1999 , pp. 1353 - 1358
Copyright
Copyright © Materials Research Society 1999

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References

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