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Polysilastyrene: Phenylmethylsilane-Dimethylsilane Copolymers as Precursors to Silicon Carbide.

ADA150689

Publication Date	1983
Personal Author	West, R.; David, L. D.; Djuorvich, P. I.; Yu, H.; Sinclair, R.
Page Count	6
Abstract	Cocondensation of phenylmethyl-SiC12 and dimethyl-SiC12 with sodium metal in toluene leads to copolymers of the formula (Me2Si)x(PhMeSi) n, where x = 0.6 to 1.4 (polysilastyrene). Synthesis and some physical properties are described for the polymer, which can be molded, cast into films, or drawn into fibers. Exposure of the solid polymer to ultraviolet light leads to crosslinking. The crosslinked polymer can be thermolyzed to silicon carbide by heating above 800 C in an inert atmosphere.
Keywords	Polysilanes Silicon carbides Styrenes Copolymers Precursors Crosslinking(Chemistry) Condensation Phenyl radicals Methyl radicals Reprints Silane/methyl-phenyl Silane/dimethyl Poly(styrene/sila)
Source Agency	Air Force Non Paid Reprints
NTIS Subject Category	71O - Plastics 99C - Polymer Chemistry
Corporate Authors	Wisconsin Univ.-Madison. Dept. of Chemistry.; Air Force Office of Scientific Research, Bolling AFB, DC.
Supplemental Notes	Pub. in Ceramic Bulletin, v62 n8 p899-903 1983.
Document Type	Journal Article
NTIS Issue Number	198511

Polysilastyrene: Phenylmethylsilane-Dimethylsilane Copolymers as Precursors to Silicon Carbide.

Polysilastyrene: Phenylmethylsilane-Dimethylsilane Copolymers as Precursors to Silicon Carbide.
ADA150689

Publication Date	1983
Personal Author	West, R.; David, L. D.; Djuorvich, P. I.; Yu, H.; Sinclair, R.
Page Count	6
Abstract	Cocondensation of phenylmethyl-SiC12 and dimethyl-SiC12 with sodium metal in toluene leads to copolymers of the formula (Me2Si)x(PhMeSi) n, where x = 0.6 to 1.4 (polysilastyrene). Synthesis and some physical properties are described for the polymer, which can be molded, cast into films, or drawn into fibers. Exposure of the solid polymer to ultraviolet light leads to crosslinking. The crosslinked polymer can be thermolyzed to silicon carbide by heating above 800 C in an inert atmosphere.
Keywords	Polysilanes Silicon carbides Styrenes Copolymers Precursors Crosslinking(Chemistry) Condensation Phenyl radicals Methyl radicals Reprints Silane/methyl-phenyl Silane/dimethyl Poly(styrene/sila)
Source Agency	Air Force Non Paid Reprints
NTIS Subject Category	71O - Plastics 99C - Polymer Chemistry
Corporate Authors	Wisconsin Univ.-Madison. Dept. of Chemistry.; Air Force Office of Scientific Research, Bolling AFB, DC.
Supplemental Notes	Pub. in Ceramic Bulletin, v62 n8 p899-903 1983.
Document Type	Journal Article
NTIS Issue Number	198511