Preprints of Annual Meeting of The Ceramic Society of Japan
Preprints of Fall Meeting of The Ceramic Society of Japan
Preprints of Annual Meeting of The Ceramic Society of Japan, 2003
Session ID : 2D02
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Melt spinning and ceramization of polymer blends of polycarbosilane and polymethylsilane
*Masaki NarisawaMasaki NisiokaKazuya SimodaKiyohito OkamuraKunio OkaTakaaki Dohmaru
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Abstract
Precursor fibers for SiC based fibers were synthesized from Polycarbosilane (PCS) - Polymethylsilane (PMS) polymer blends. Addition of 0.5 mass% PMS can be melt-spun. Addition of 20 mass% PMS, however, requires an addition of a cross-linking inhibitor for melt-spinning. PMS addition is generally effective to increase resultant ceramic yields and to maintain fiber strength after high temperature exposures. In the PMS containing precursor fibers, a holding at 573K during the pyrolysis process is remarkably effective to increase the ceramic yield and the strength. PMS probably acts as a cross-linking agent at 573K to combine PCS chains.
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© The Ceramic Society of Japan 2003
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