Claims
- 1. A method of producing a nanoporous composition comprising:
- providing a template strand having a plurality of repeating units and a plurality of reactive groups;
- reacting at least one of the reactive groups with a modifying molecule, thereby forming at least one crosslinking functionality;
- reacting the at least one crosslinking functionality to another crosslinking functionality on a polymeric strand to crosslink the template strand with the polymeric strand, thereby forming a crosslinked polymer, wherein at least one of the modifying molecule and the polymeric strand has a thermolabile group; and
- providing sufficient energy to the crosslinked polymer to degrade at least part of the thermolabile group, and thereby producing a void.
- 2. The method of claim 1, wherein the step of providing a template strand comprises polymerizing a plurality of monomers by a reaction mechanism selected from the group consisting of addition and substitution reactions.
- 3. The method of claim 2, wherein the substitution reaction comprises a nucleophilic aromatic substitution.
- 4. The method of claim 2, wherein at least one of the monomers comprises an aromatic compound.
- 5. The method of claim 4, wherein the aromatic compound is selected from the group consisting of a bisphenol and a difluoroaromatic compound.
- 6. The method of claim 5, wherein the aromatic compound is selected from the group consisting of a 4,4'-difluorobenzil, a fluorene bisphenol and a 3,3'-dihydroxytolane.
- 7. The method of claim 1, wherein the thermolabile group comprises an aliphatic portion.
- 8. The method of claim 1, wherein the aliphatic portion is selected from the group consisting of a poly(propylene oxide), a poly(methylmethacrylate), a polylactone, a polylactide, a polycarbonate, and an ethylene glycol-poly(caprolactone).
- 9. The method of claim 1 wherein the modifying molecule comprises an aromatic portion.
- 10. The method of claim 9 wherein the modifying molecule is selected from the group consisting of a 1,3-diarylpropane-2-one and a 1,2-diaminoaryl.
- 11. The method of claim 9 wherein the modifying molecule is selected from the group consisting of a 1,3-diphenylpropane-2-one and a 1,2-diaminobenzene.
- 12. The method of claim 1 wherein the modifying molecule further comprises a thermolabile portion.
- 13. The method of claim 1 wherein the crosslinking functionality comprises a chemical group selected from the group consisting of a diene, a dienophile, a nucleophile, and an electrophile.
- 14. The method of claim 13 wherein the crosslinking functionality comprises a chemical group selected from the group consisting of a tetracyclone and an ethynyl.
- 15. The method of claim 1, wherein the step of reacting the at least one crosslinking functionality involves a Diels-Alder reaction.
- 16. The method of claim 1, wherein the polymeric strand comprises an ethynyl.
- 17. The method of claim 1, wherein the polymeric strand comprises the template strand.
- 18. A method of producing a nanoporous composition comprising:
- providing a template strand having a plurality of repeating units, a plurality of reactive groups, and at least one crosslinking functionality;
- reacting at least one of the reactive groups with a thermolabile group;
- reacting the at least one crosslinking functionality to another crosslinking functionality on a polymeric strand to crosslink the template strand with the polymeric strand, thereby forming a crosslinked polymer; and
- providing sufficient energy to the crosslinked polymer to degrade at least part of the thermolabile group, and thereby producing a void.
- 19. The method of claim 18, wherein the step of providing a template strand comprises polymerizing a plurality of monomers by a reaction mechanism selected from the group consisting of addition and substitution reactions.
- 20. The method of claim 18, wherein the template strand comprises a polybenzil.
- 21. The method of claim 18, wherein the at least one crosslinking functionality comprises an ethynyl.
- 22. The method of claim 18 wherein the thermolabile group comprises an aromatic portion.
- 23. The method of claim 22 wherein the thermolabile group comprises a 1,2-diaminoaryl.
- 24. The method of claim 18 wherein the step of reacting the at least one of the first reactive groups with a thermolabile group produces a poly(arylene quinoxaline).
- 25. The method of claim 18 wherein the step of reacting the at least one crosslinking functionality to another crosslinking functionality involves a Diels-Alder reaction.
Parent Case Info
This application claims the benefit of U.S. provisional application Ser. No. 60/128,534 filed Apr. 9, 1999, incorporated herein by reference in its entirety.
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Bell et al. |
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5965679 |
Godschaix et al. |
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