Synthesis, characterization and ceramic conversion reactions of borazine-modified hydridopolysilazanes
Conference
·
OSTI ID:141693
- Univ. of Pennsylvania, PA (United States)
The high yield synthesis of borazine-substituted hydridopolysilanes has been achieved by the reaction of liquid borazine with hydridopolysilazane. The spectroscopic data indicate that the new polymers have retained their hydridopolysilazane backbones, but are substituted with pendant borazines by means of a borazine-boron to polymer-nitrogen linkage. Molecular weight and distribution studies show a decrease in molecular weight with increasing borazine content which apparently results from chain scission reactions Si-N bonds in the polymer backbone. Studies of the thermolytic reactions of the polymers demonstrated that they are converted in high ceramic and chemical yields to composite ceramic materials composed of silicon-nitride, silicon-carbide and boron-nitride.
- OSTI ID:
- 141693
- Report Number(s):
- CONF-930304--
- Country of Publication:
- United States
- Language:
- English
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