溶融紡糸によるポリカルボシラン-ポリメチルシランブレンドポリマーからの炭化ケイ素基セラミック繊維の合成(<ゲストエディターによる特集>有機-無機変換プロセス)

概要

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A melt-spinnable precursor for SiC based fibers was prepared from blend polymers of polycarbosilane (PCS) and polymethylsilane (PMS). After melt spinning, thermal oxidation curing, and pyrolysis, Si-C-O fibers were obtained. The addition of a small amount of PMS (0.2 or 0.5mass%) to PCS was effective in increasing the resulting ceramic yield at 1273K. Fiber decomposition temperature of the obtained Si-C-O fibers shifted to higher temperature (〜100K) by the PMS addition. For high PMS content (20mass%), however, cross-linking of the blend polymers made the spinning process impossible. Doping of a radical trapping agent in the starting blend polymers was effective in preventing the cross-linking process. Si-C-O fibers with high oxygen content and reduced C/Si ratio were obtained in this case.
社団法人日本セラミックス協会の論文
2006-06-01