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| Preparation of SiC--C fiber by polycarbosilane synthesized by co--pyrolysis of PDMS and PVC |
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| 国防科技大学 |
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Cite this article:
. Preparation of SiC--C fiber by polycarbosilane synthesized by co--pyrolysis of PDMS and PVC. Chin J Mater Res, 2004, 18(3): 295-300.
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Abstract Polycarbosilane(PCS--P) was synthesized by co--pyrolysis and polymerization using
polydimethylsilane (PDMS) and polyvinylchloride (PVC), and SiC--C fiber was obtained
by melt--spinning, curing and heat treatment process. The composition, structure and
properties of precursors PCS--P and SiC--C fibers were investigated. The results
showed that a small number of short carbon chains were introduced into structure of
polycarbosilane when mixed ratios of PVC were in the range of 3\%$\sim$7\% by the
polymerization. The SiC--C fibers prepared by such PCS--P have good crystallization
and oxygenation resistance, and their resistivity decreases remarkably to
10$^{-1}\sim$10$^{1}\Omega\cdot$cm.
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Received: 19 July 2004
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