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首页> 美国政府科技报告 >Catalytic synthesis of silicon carbide preceramic polymers: Polycarbosilanes. Technical research progress report, October 1, 1991--September 30, 1992
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Catalytic synthesis of silicon carbide preceramic polymers: Polycarbosilanes. Technical research progress report, October 1, 1991--September 30, 1992

机译：催化合成碳化硅陶瓷前体聚合物：聚碳硅烷。技术研究进展报告，1991年10月1日 - 1992年9月30日

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Polycarbosilanes are the most successful and widely studied class of polymer precursors for silicon carbide, but traditional methods for their synthesis are inefficient and nonselective. This project is focused on developing transition metal catalysts for the synthesis of polycarbosilanes and other preceramic polymers. In recent work we have developed the first homogeneous transition metal catalysts for the dehydrogenative coupling of simple alkyl silanes to oligomeric and polymeric carbosilanes, H-(SiR(sub 2)CR(prime)(sub 2))n-SiR(sub 3). The coupling of alkylgermanes, however, yields the corresponding oligomeric poly(germanes) (Ge-Ge). Future work will help elucidate the mechanisms of these catalytic process, explore the use of hydrogen acceptors as reaction accelerators, and develop new and more active catalysts.

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