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Papers by Keyword: Catalytic Process

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Kumada Rearrangement of Polydimethylsilane Using a Catalytic Process

Authors: Y. Kim, Dong Geun Shin, Hyung Rae Kim, Doug Young Han, Young Un Kang, Doh Hyung Riu

Abstract: Polycarbosilane was synthesized from polydimethylsilane in the presence of ZSM-5 (Si/Al=30) as a catalyst at 350oC-400oC. Characterization of synthesized polycarbosilane was performed with 29Si Solid NMR, FT-IR, and GPC analysis. Number average of molecular weight (Mn) of the polycarbosilane was ranged from 350 to 2340.

Preparation of Polycarbosilane Using a Catalytic Process and Its Practical Uses

Authors: Y. Kim, Dong Geun Shin, Hyung Rae Kim, Hong Sik Park, Doh Hyung Riu

Abstract: Polycarbosilane is the most typical polymeric precursor for SiC ceramic. In this study, liquid type polycarbosilane was synthesized from polydimethylsilane in the presence of solid acid catalyst at 350oC. The molecular weights of the polycarbosilane were ranged between 350 and 530. Synthesized polycarbosilane was characterized with 29Si Solid NMR, FT-IR and GPC analysis. The synthesized polycarbosilane can be used as a good organometallic precursor for SiC coating via chemical vapor deposition or spin coating.

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