Abstract
Melt-spinnable polyaluminocarbosilane (PACS) is of importance as the precursor to prepare the Si–C–Al–O ceramic fibers, which can be employed for the preparation of SiC fibers with high tensile strength and good thermal stability. In this work, low-softening-point polycarbosilane (LPCS) was synthesized by pyrolysis of polydimethylsilane and applied to prepare PACS precursors with variable aluminum content by the reaction with aluminum(III) acetylacetonate. GPC, 1H NMR, UV–Vis, FT-IR, 29Si NMR, 27Al MAS NMR, TGA, and elemental analysis were used to analyze the composition and structure of the PACS precursors. Finally, Si–C–Al–O fibers were obtained successfully by melt-spinning, curing, and final pyrolysis of the precursors. The method demonstrated in this work can be further extended to synthesize other melt-spinnable metal-containing polycarbosilane (PMCS, M: Zr, Ti, Fe, Co, et.) of high ceramic yield and adjustable M content by reacting LPCS with other corresponding metal-containing compounds.
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Acknowledgements
This research was sponsored by the National Natural Science Foundation of China (Grant No. 51302313) and the Fund of Science and Technology on Advanced Ceramic Fibers and Composites Laboratory (Grant Nos. 9140C820203140C82345, 9140C820403150C82024). The financial support from Postdoctoral Science Foundation of China (Grant No. 2014M552685) was appreciated as well. The authors are also thankful for the financial support from Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province and Aid Program for Innovative Group of National University of Defense Technology.
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Gou, Y., Wang, H., Jian, K. et al. Facile synthesis of melt-spinnable polyaluminocarbosilane using low-softening-point polycarbosilane for Si–C–Al–O fibers. J Mater Sci 51, 8240–8249 (2016). https://doi.org/10.1007/s10853-016-0101-7
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DOI: https://doi.org/10.1007/s10853-016-0101-7