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US 5,686,027 AGranted
Process for forming carbon-carbon composite
AssigneeAerojet-General Corporation
InventorsRobert Earl Olsen, Harlan Frederick Reese, Stephen John Backlund
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Abstract
A novel polyphenylene resin is formed by the polycyclotrimerization of vinylethynylbenzene, diethynylbenzene and phenylacetylene. Polymerization is carried out under conditions which result in the retention of unreacted vinyl groups from the vinylethynylbenzene component, which are then susceptible to crosslinking. The polymer is useful in the formation of high-performance carbon-carbon composites, producing an unusually high char yield with advantageous handling and processing characteristics.
Claims19
A process for forming a carbon-carbon composite, comprising:
- (a) copolymerizing a monomer mixture comprising ##STR3## with a chain terminator having the formula ##STR4## under conditions selected to leave at least a substantial portion of the vinyl groups of monomer (i) unreacted;
- (b) dissolving the product of step (a) in a solvent to form a resin solution;
- (c) curing said resin solution to effect crosslinking Of at least a substantial portion of said vinyl groups unreacted in step (a);
- (d) pyrolyzing the product of said (c) at a temperature of from about 100.degree. C. to about 200.degree. C.;
- and
- (e) carbonizing the product of step (d) at a temperature of from about 800.degree. C. to about 1000.degree. C.
3 more elements
Dependencies are inferred from the claim text.