A rigid, rod liquid crystal polymer includes a poly(phenylene sulfonic acid).
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Having described the invention the following is claimed: 1. A rigid, rod liquid crystal polymer, comprising a poly(phenylensulfonic acid) synthesized via an Ullmann coupling reaction from a monomer including a dihaloaryl sulfonic acid monomer. 2. The polymer of claim 1, the dihalo aryl sulfonic a
Having described the invention the following is claimed: 1. A rigid, rod liquid crystal polymer, comprising a poly(phenylensulfonic acid) synthesized via an Ullmann coupling reaction from a monomer including a dihaloaryl sulfonic acid monomer. 2. The polymer of claim 1, the dihalo aryl sulfonic acid monomer comprising at least one of a dihalophenyl sulfonic acid monomomer, a dihalophenyl disulfonic acid monomer, a dihalo-biphenyldisulfonic acid monomer, a dihalo-triphenyldisulfonic acid monomer, or a dihalo-triphenyl trisulfonic acid monomer. 3. The polymer of claim 1, the poly(phenylene sulfonic acid) comprising a biphenylene disulfonic acid repeating unit, the biphenylene disulfonic acid repeating unit forming a substantial portion of a main chain of the polymer. 4. The polymer of claim 1, the poly(phenylene sulfonic acids) being chemically modified to incorporate at least one of bulky side groups, angled groups, or cross-linkable groups on a main chain of the polymer. 5. The polymer of claim 4, the bulky side groups, angled groups, cross-linkable groups rendering the poly(phenylene sulfonic acids) substantially water insoluble. 6. The polymer of claim 4, the at least one of bulky side groups or cross-linkable groups being incorporated onto the poly(phenylene sulfonic acid) backbone via a sulfone or a sulfonate ester formation reaction. 7. The polymer of claim 1, including the following structure: where R1 comprises at least one of a bulky or a cross-linkable group and where at least one of n1 and n2 is not 0. 8. The polymer of claim 7, R1 being selected from the group consisting of tert-butylalkyl groups, tert-butyl phenyl groups, di(tert-butyl)phenyl groups, tert-butyl groups, tert-butyl benzyl groups, tert-butylaryl groups, tert-butylalkylaryl groups, di(tert-butylalkyl)aryl groups, tert-butyl hydroxyl, alkoxy, or aryloxy phenyl groups, di(tert-butyl)hydroxyl, alkoxy, or aryloxy phenyl groups, bulky aryl groups, bulky alkylaryl groups, tert-amyl groups, adamantyl groups, adamantylphenyl groups, substituted and unsubstituted phenols and thiophenols, 1,3,5-triphenyl benzene, trypticene, tetracylene, polycylic aromatic hydrocarbons, linear and branched fluoroalkyl groups, fluoroalkyl sulfones, block hydrocarbon/fluorocarbon groups, and ethers thereof. 9. The polymer of claim 1 comprising a random, graded or block repeating units of phenylene sulfonic acid and a second repeating unit that contains at least one bulky group, angled group, or cross-linkable group. 10. A method of forming a rigid, rod liquid crystal polymer; polymerizing via an Ullmann coupling reaction a dihaloaryl sulfonic acid monomer to form a poly(phenylene sulfonic acid). 11. The method of claim 10, the dihaloaryl sulfonic acid monomer comprising at least one of a dihalophenyl sulfonic acid monomomer, a dihalophenyl disulfonic acid monomer, a dihalo-biphenyldisulfonic acid monomer, a dihalo-triphenyldisulfonic acid monomer, or a dihalo-triphenyl trisulfonic acid monomer. 12. The method of claim 10, the dihaloaryl sulfonic acid monomer comprising at least one of a 4,4'-dihalo-2,2'-biphenyldisulfonic acids, 4,4'-dihalo-3,3'biphenyldisulfonic acid, or a 1,4-dihalophenyl sulfonic acid. 13. The method of claim 12, further comprising chemically modifying the poly(phenylene sulfonic acid) to incorporate at least one of bulky groups or cross-linkable groups. 14. The method of claim 13, the at least one of bulky groups or cross-linkable groups being incorporated onto the poly(phenylene sulfonic acid) backbone via a sulfone or sulfonate ester formation reaction. 15. The method of claim 13, at least one of bulky groups or cross-linkable groups being selected from the group consisting of tert-butylalkyl groups, tert-butyl phenyl groups, di(tert-butyl)phenyl groups, tert-butyl groups, tert-butyl benzyl groups, tert-butylaryl groups, tert-butylalkylaryl groups, di(tert-butylalkyl)aryl groups, tert-butyl hydroxyl, alkoxy, or aryloxy phenyl groups, di(tert-butyl)hydroxyl, alkoxy, or aryloxy phenyl groups, bulky aryl groups, bulky alkylaryl groups, tert-amyl groups, adamantyl groups, adamantylphenyl groups, substituted and unsubstituted phenols and thiophenols, 1,3,5-triphenyl benzene, trypticene, tetracylene, and polycylic aromatic hydrocarbons, linear and branched fluoroalkyl groups, fluoroalkyl sulfones, block hydrocarbon/fluorocarbon groups, and ethers thereof.
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