Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
J. Phys. IV France 03 (1993) C7-1299-C7-1304
Synthesis of poly(dimethylsilylene-co-diphenylsilylene) polymers as precursors for SiC ceramicsS.M. BUSHNELL-WATSON, R.J.P. EMSLEY, M.J. MORRIS and J.H. SHARP
The University of Sheffield, Department of Engineering Materials, P.O. Box 600, Sir Robert Hadfield Building, Mappin Street, Sheffield S1 4DU, England
Silicon carbide ceramics, especially fibres, are being fabricated via polymeric precursors. Although such fibres are commercially available, there is a demand for improved performance particularly at elevated temperatures. A range of copolymers has been synthesized from the monomers, dimethyldichlorosilane and diphenyldichlorosilane, by a Wurtz reaction involving dechlorination using sodium metal in xylene. The products of reaction were characterised by a range of techniques, including gel permeation chromatography (GPC), infra-red spectroscopy (IR), X-ray powder diffraction (XRD) and thermogravimetry (TG).
© EDP Sciences 1993