US5236686A
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US
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Precursor polyphenylene for and method of producing glassy carbon
Assignee: University of South Carolina
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Filing: 1991-08-19
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Granted: 1993-08-17
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Expires: 2011-08-19
Abstract
Abstract Polymeric carbon can be formed by a method comprising the steps of (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; (b) functionalizing the brominated polyphenylene to replace the bromide groups with a substituted or unsubstituted acetylene group; and (c) heating the functionalized polymer to a temperature of 900° 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.
Inventors
- 👤 James M. Tour
- 👤 Eric Stephens
- 👤 Joanna F. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:42
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/524; C08; C08G; C08G2261/00; C08G2261/30; C08G2261/31; C08G2261/312
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
76 words
A method for producing polymeric carbon comprising the steps of (a) polymerizing 1-bromo-4-lithiobenzene to form a brominated polyphenylene having brominated and non-brominated residues within the polymer, wherein the ratio of non-brominated residues to brominated residues is 5 or less; (b) functionalizing the brominated polyphenylene to replace the bromide groups with a substituted or unsubstituted acetylene group; and (c) heating the functionalized polymer to a temperature of 900° C. in an inert atmosphere to form polymeric carbon.
Claim 2
Independent Claim
76 words
A method for producing polymeric carbon comprising the steps of (a) polymerizing 1-bromo-4-lithiobenzene to form a brominated polyphenylene having brominated and non-brominated residues within the polymer, wherein the ratio of non-brominated residues to brominated residues is 5 or less; (b) functionalizing the brominated polyphenylene to replace the bromide groups with a substituted or unsubstituted acetylene group; and (c) heating the functionalized polymer to a temperature of 900° C. in an inert atmosphere to form polymeric carbon.
Claim 3
Dependent Claim
15 words
A method according to claim 1, wherein the 1-bromo-4-lithiobenzene is polymerized in an ethereal solvent.
Claim 4
Dependent Claim
11 words
A method according to claim 2, wherein the solvent is tetrahydrofuran.
Claim 5
Dependent Claim
20 words
A method according to claim 1, wherein the brominated polyphenylene is functionalized using a palladium catalyst and a copper catalyst.
Claim 6
Dependent Claim
22 words
A method according to claim 4, wherein the brominated polyphenylene is functionalized with an acetylene selected from among phenylacetylenes, silylacetylenes and n-alkylacetylenes.
Claim 7
Dependent Claim
14 words
A method according to claim 5, wherein the brominated polymer is functionalized with phenylacetylene.
Claim 8
Dependent Claim
15 words
A method according to claim 4, wherein the 1-bromo-4-lithiobenzene is polymerized in an ethereal solvent.
Claim 9
Dependent Claim
11 words
A method according to claim 7, wherein the solvent is tetrahydrofuran.
Claim 10
Dependent Claim
22 words
A method according to claim 7, wherein the brominated polyphenylene is functionalized with an acetylene selected from among phenylacetylenes, silylacetylenes and alkylacetylenes.
Claim 11
Dependent Claim
14 words
A method according to claim 7, wherein the brominated polymer is functionalized with phenylacetylene.
Claim 12
Dependent Claim
23 words
A method according to claim 1, wherein the functionalized polymer is heated to a temperature of about 900° C. in a nitrogen atmosphere.
Claim 13
Dependent Claim
15 words
A method according to claim 11, wherein the 1-bromo-4-lithiobenzene is polymerized in an ethereal solvent.
Claim 14
Dependent Claim
11 words
A method according to claim 12, wherein the solvent is tetrahydrofuran.
Claim 15
Dependent Claim
20 words
A method according to claim 11, wherein the brominated polyphenylene is functionalized using a palladium catalyst and a copper catalyst.
Claim 16
Dependent Claim
22 words
A method according to claim 14, wherein the brominated polyphenylene is functionalized with an acetylene selected from among phenylacetylenes, silylacetylenes and alkylacetylenes.
Claim 17
Dependent Claim
14 words
A method according to claim 14, wherein the brominated polymer is functionalized with phenylacetylene.
Claim 18
Dependent Claim
15 words
A method according to claim 14, wherein the 1-bromo-4-lithiobenzene is polymerized in an ethereal solvent.
Claim 19
Dependent Claim
11 words
A method according to claim 17, wherein the solvent is tetrahydrofuran.
Claim 20
Dependent Claim
22 words
A method according to claim 17, wherein the brominated polyphenylene is functionalized with an acetylene selected from among phenylacetylenes, silylacetylenes and alkylacetylenes.
Claim 21
Dependent Claim
14 words
A method according to claim 17, wherein the brominated polymer is functionalized with phenylacetylene.
References Cited (Backward Citations)
US4070333A
Cited
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