The Characterisation of Polysilanes and Polycarbosilanes for the Production of Silicon Carbide Fibres
A range of polysilane and polycarbosilane copolymers has been synthesised as potential precursors for the fabrication of silicon carbide fibres for use in high temperature composites. The molecular weight distribution of the polymers has been determined by gel permeation chromotagraphy and shown to depend on the molecular structure in the copolymer. Thermogravimetry gave information about the temperatures at which loss in mass occurred and the ultimate ceramic yield, which was variable. Some of the polymers have been spun into fibres and factors affecting their ease of spinning are discussed.
KeywordsMolecular Weight Distribution Ceramic Fibre Ceramic Matrice Ceramic Yield Silicon Carbide Fibre
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