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Title: Precursors for silicon carbide synthesised from dichloromethylsilane derivatives
Authors: Bao, Xujin
Edirisinghe, Mohan J.
Fernando, Gerard F.
Folkes, Michael J.
Keywords: Polysilanes
Issue Date: 1998
Publisher: © Elsevier
Citation: BAO, X. ... et al., 1998. Precursors for silicon carbide synthesised from dichloromethylsilane derivatives. Journal of the European Ceramic Society, 18 (7), pp.915-922.
Abstract: Several polysilanes, including two groups of copolymers and a group of ter-polymers, with overall functionalities ranging between 2 and 3 were prepared using the alkali metal dechlorination reaction. The yields of the soluble solid fractions of these polymers (the potential ceramic precursor) were in the range 40–70% wt and decreased with increasing overall functionalities in both cases of co- and terpolymers. The molecular weights and FT-IR spectra of the precursors have been determined and the ceramic in the residue after pyrolysis has been identified as silicon carbide. The pyrolytic yield can be increased by using a polymeric precursor of higher overall functionality. The reasons for this are discussed with reference to pyrolysis mechanisms. In particular, some of the ter-polymeric precursors synthesised with a high yield also give a high yield on pyrolysis due to the presence of branched structures and potential cross-linking sites.
Description: Closed access.
Sponsor: The authors wish to thank the Soft Solids Initiative of EPSRC for funding this project (EPSRC Grant No. GR/L21976).
Version: Published
DOI: 10.1016/S0955-2219(97)00194-5
URI: https://dspace.lboro.ac.uk/2134/22444
Publisher Link: http://dx.doi.org/10.1016/S0955-2219(97)00194-5
ISSN: 0955-2219
Appears in Collections:Closed Access (Materials)

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