Catalytic synthesis of silylene-vinylene preceramic polymers from ethynylsilanes

Journal Article · Mon Oct 11 04:00:00 EDT 1993 · Macromolecules; (United States)

DOI:https://doi.org/10.1021/ma00073a021· OSTI ID:5724531

Pang, Y; Ijadi-Maghsoodi, S; Barton, T J ^[1]

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1. 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), Journal Name: Macromolecules; (United States) Vol. 26:21; ISSN MAMOBX; ISSN 0024-9297
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
360602 -- Other Materials-- Structure & Phase Studies
CARBIDES
CARBON COMPOUNDS
CATALYSTS
FABRICATION
MICROSTRUCTURE
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
POWDERS
SILICON CARBIDES
SILICON COMPOUNDS