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Synthesis and characterization of polysilane precursors for silicon carbide fibers

Published online by Cambridge University Press:  03 March 2011

Wayne R.I. Cranstone ,
Suzannc M. Bushnell-Watson  and
John H. Sharp
Wayne R.I. Cranstone
Affiliation:
Department of Engineering Materials, University of Sheffield, Sheffield S1 3JD, United Kingdom
Suzannc M. Bushnell-Watson
Affiliation:
Department of Engineering Materials, University of Sheffield, Sheffield S1 3JD, United Kingdom
John H. Sharp*
Affiliation:
Department of Engineering Materials, University of Sheffield, Sheffield S1 3JD, United Kingdom
*
a)Author to whom correspondence should be addressed.
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Abstract

A series of polysilanes was prepared by the alkali metal dechlorination of chlorosilane monomers, in which the overall functionality, F, of the reaction was varied. Starting monomers of functionality f = 2.0 and 3.0 were reacted together in various proportions to achieve values of F of 2.2, 2.35, and 2.5. In addition to varying the functionality of the reaction, three different difunctional monomers, dimethyldichlorosilane (DMDCS), diphenyldichlorosilane (DPDCS), and methylphenyldichlorosilane (MPDCS), and two trifunctional monomers, phenyltrichlorosilane (PTCS) and ethyltrichlorosilane (ETCS), were used. The effect of these changes on the yields of the polysilanes was determined, and the products were investigated by the use of thermogravimetry (TG), gel permeation chromatography (GPC), and thermomechanical analysis (TMA). The ability to spin a polysilane fiber was also assessed.

Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 10 , October 1995 , pp. 2659 - 2667
Copyright
Copyright © Materials Research Society 1995

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