Precursor polyphenylene for and method of producing glassy carbon
US5236686A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1991 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Aug 19, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2261/312
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Polymeric carbon can be formed by a method comprising the steps of PA1 (a) polymerizing 1-bromo-4-lithiobenzene to form a brominated polyphenylene wherein the ratio of brominated to non-brominated residues in the polymer is 1:5 or greater; PA1 (b) functionalizing the brominated polyphenylene to replace the bromide groups with a substituted or unsubstituted acetylene group; and PA1 (c) heating the functionalized polymer to a temperature of 900.degree. C. to form polymeric carbon. Preferably, the brominated polyphenylene is formed in an ethereal solvent such as tetrahydrofuran and then functionalized using a palladium catalyst and a copper catalyst. When the acetylene substituent is phenylacetylene, the product of the method is glassy carbon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.