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A method and compositions are described which improve extrusion-and creep-resistance of components for use in a high temperature applications including sealing elements and seal connectors among others. The method includes providing a composition having an aromatic polymer and a crosslinking compoun

A method and compositions are described which improve extrusion-and creep-resistance of components for use in a high temperature applications including sealing elements and seal connectors among others. The method includes providing a composition having an aromatic polymer and a crosslinking compound, and subjecting the composition to a heat molding process to form the component and crosslink the aromatic polymer.

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1. A composition for formation of an extrusion-resistant sealing member, comprising: an aromatic polymer; anda crosslinking compound, wherein the crosslinking compound has a structure according to formula (II) below: wherein A is an arene moiety having a molecular weight of less than 10,000 g/mol,

1. A composition for formation of an extrusion-resistant sealing member, comprising: an aromatic polymer; anda crosslinking compound, wherein the crosslinking compound has a structure according to formula (II) below: wherein A is an arene moiety having a molecular weight of less than 10,000 g/mol, R1 is selected from a group consisting of hydroxide (—OH), amine (—NH2), halide, ether, ester, or amide, and x =2.0 to 6.0. 2. The composition according to claim 1, wherein the polymer is selected from the group consisting of a polyarylene polymer, a polysulfone, a polyphenylene sulfide, a polyimide, a polyamide, a polyurea, a polyurethane, a polyththalamide, a polyamide-imide, an aramid, a polybenzimidazole, and blends, copolymers and derivatives thereof. 3. The composition according to claim 2, wherein the aromatic polymer is a polyarylene polymer and/or a polysulfone polymer, and blends, copolymers and derivatives thereof. 4. The composition according to claim 3, wherein the aromatic polymer is a polyarylene ether polymer including polymer repeating having units of structure according to formula (IV) below: O—Ar1—O—Ar2mO—Ar3—O—Ar4n  (IV) wherein Ar1, Ar2, Ar3 and Ar4 are identical or different aryl radicals, m is 0 to 1, and n is 1-m. 5. The composition according to claim 3, wherein the aromatic polymer is at least one of polyetheretherketone, polyetherketone, polyetherketoneetherketoneketone, polyetherketoneketone, polysulfone, polyphenylene sulfide, polyethersulfone, polyarylsulfone, and blends, copolymers and derivatives thereof. 6. The composition according to claim 1, wherein the crosslinking compound is 9,9′-(biphenyl-4,4′-diyl)bis(9H-fluoren-9-ol) and has a general structure according to formula (V): 7. The composition according to claim 1, further comprising a cross-linking reaction additive capable of reacting with the cross-linking compound to form a reactive intermediate in the form of an oligomer, which reactive intermediate oligomer is capable of cross-linking an organic polymer. 8. The composition according to claim 7, wherein the cross-linking reaction additive is an organic acid which may be glacial acetic acid, formic acid, and/or benzoic acid. 9. The composition according to claim 7, wherein the cross-linking reaction additive is an acetate compound that has a structure according to formula (III): wherein M is a Group I or a Group II metal; and R2 is an alkyl, aryl, or aralkyl group, wherein the alkyl group is a hydrocarbon group of 1 to about 15 carbon atoms having 0 to about 5 ester or ether groups along or in the chain of the hydrocarbon group, wherein R2 has 0 to about 5 functional groups. 10. The composition according to claim 1, wherein the composition is an unfilled composition. 11. A sealing component of a sealing assembly formed by a method comprising the step of crosslinking a composition according to claim 1. 12. A sealing connector having a seal connector body formed by a method comprising the step of crosslinking a composition according to claim 1.