ISSN:
0268-2605
Keywords:
silylcarbodi-imide
;
bis(trimethylsilyl)carbodi-imide
;
poly(methylsilsesquicarbodi-imide)
;
sol-gel
;
pyrolysis
;
thermal analysis
;
mass spectra
;
silicon carbonitride
;
argon physisorption
;
high-resolution transmission electron microscopy (HR TEM)
;
Chemistry
;
Industrial Chemistry and Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A novel polymeric organosilicon gel with the composition [MeSi(NCN)1.5]n synthesized by the reaction of MeSiCl3 with Me3Si-N=C=N-SiMe3 is reported. The reaction is performed without any solvent and with catalytic amounts of pyridine and provides highly cross-linked poly(methylsilsesquicarbodi-imide) in the form of a stable non-oxidic gel with unusual low open porosity (〈1 m2 g-1). The Si-C-N gel transforms to an amorphous silicon carbonitride ceramic, SiC1.1N1.6, by the thermally induced ceramization at 1200 °C in inert atmosphere (argon). The gel-derived silicon carbonitride is thermally stable up to 1450 °C. The synthesis, characterization and pyrolysis behavior of the new polyorganosilicon gel is discussed. © 1997 John Wiley & Sons, Ltd.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
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