Borate-Catalyzed Thermolysis of Polymethylsilane

Polymethylsilane (PMS) with a general formula [−(CH3SiH)1 - y −(CH3Si) y −] n has been synthesized by Würtz type polycondensation of methyldichlorosilane. Copolycondensation with dimethylchlorosilane was realized in an attempt to control the viscosity of the PMS. Thermal reactions at 230 °C with sma...

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Bibliographic Details
Published in:Chemistry of materials 1998-01, Vol.10 (1), p.297-303
Main Authors: Boury, Bruno, Bryson, Nathan, Soula, Gérard
Format: Article
Language:English
Subjects:
Applied sciences
Chemical modifications
Exact sciences and technology
Inorganic and organomineral polymers
Physicochemistry of polymers
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Summary:Polymethylsilane (PMS) with a general formula [−(CH3SiH)1 - y −(CH3Si) y −] n has been synthesized by Würtz type polycondensation of methyldichlorosilane. Copolycondensation with dimethylchlorosilane was realized in an attempt to control the viscosity of the PMS. Thermal reactions at 230 °C with small amounts (1 wt %) of boron derivatives such as B[OSi(CH3)3]3 serve to cross-link this Si−H-containing organosilicon polymer. As a result, when the products of these reactions are pyrolyzed at 1000 °C under argon, the ceramic residue yields are increased considerably over those obtained with the original polymers.
ISSN:0897-4756
1520-5002
DOI:10.1021/cm970443a