Catalytic synthesis of silylene-vinylene preceramic polymers from ethynylsilanes
Journal Article
·
· Macromolecules; (United States)
- Ames Lab., Ames, IA (United States)
Catalytic hydrosilylation of diorganoethynylsilanes, R[sub 2]HSiC[triple bond]CH, with H[sub 2]PtCl[sub 6] cleanly affords soluble poly(silylenevinylenes), -(R[sub 2]SiCH[double bond]CH)[sub n]-, which were characterized by [sup 1]H NMR, [sup 13]C NMR, [sup 29]Si NMR, FT-IR, GPC, and TGA. Bulk pyrolysis of these polymers under an inert atmosphere at temperatures above 1100C resulted in the formation of silicon carbide powders as characterized by X-ray diffraction spectra. Melt-spun fibers from these polymers were surface cross-linked and then thermally converted to SiC fibers with a dense surface microstructure.
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 5724531
- Journal Information:
- Macromolecules; (United States), Vol. 26:21; ISSN 0024-9297
- Country of Publication:
- United States
- Language:
- English
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