Silicon Carbide Base Ceramic Fiber Synthesis from Polycarbosilane-Polymethylsilane Blend Polymers by Melt Spinning
| Autor: | Masaki Nishioka, Hiroshi Mabuchi, Takashi Iseki, Kiyohito Okamura, Takaaki Dohmaru, Masaki Narisawa, Kazuya Shimoda, Kunio Oka |
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| Rok vydání: | 2006 |
| Předmět: |
chemistry.chemical_classification
Thermal oxidation Materials science Thermal decomposition General Chemistry Polymer Condensed Matter Physics chemistry visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Melt spinning Composite material Pyrolysis Spinning Curing (chemistry) |
| Zdroj: | Journal of the Ceramic Society of Japan. 114:511-516 |
| ISSN: | 1882-1022 0914-5400 |
| DOI: | 10.2109/jcersj.114.511 |
| Popis: | 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 0.5 mass%) to PCS was effective in increasing the resulting ceramic yield at 1273 K. Fiber decomposition temperature of the obtained Si-C-O fibers shifted to higher temperature (~100 K) by the PMS addition. For high PMS content (20 mass%), 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. |
| Databáze: | OpenAIRE |
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