Copolymers of tetrafluoroethylene and perfluorinated sulfonyl monomers and membranes made therefrom
AssigneeGas Research Institute
InventorDarryl D. Desmarteau
Life of this patent
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Abstract
Novel perfluorinated sulfonyl monomers and polymers and membranes made therefrom are provided. The fluorocarbon monomers have the general formula: ##STR1## wherein X is CH or N, I is H, K, Na, or a Group I or II metal, R.sub.f is one or more fluorocarbon group, including fluorocarbon ethers and/or sulfonyl groups and/or perfluoro-non-oxy acid groups, R.sub.f, is C.sub.n F.sub.2n+1 (n=0,1,2, . . .), Y is C.sub.n F.sub.2n+1 (n=0,1,2, . . .) and m is 0 or 1. The monomers are made from the non-oxy superacid groups ##STR2## Copolymers of the above monomers with other monomeric material such as tetrafluoroethylene are also provided. These copolymers may then be cast into ionomer membranes and other structures for use in electrochemical processing.
Claims12
A copolymer of tetrafluoroethylene and monomer having the general formula:
- ##STR26## wherein X is C, CH or N, Z is a Group IA element, calcium, magnesium, strontium, or barium, R.sub.f is a perfluoroalkylene group chosen from the group consisting of a perfluoroalkylene, a perfluoroalkylene containing one or more ether groups, a perfluoroalkylene containing one or more sulfonyl groups, and a perfluoroalkylene containing ether and sulfonyl groups, R.sub.f, is C.sub.n F.sub.2+1 (n=0, 1, 2, . . . 10), Y is C.sub.n F.sub.2n+1 (n=0, 1, 2, . . .10) and m is 0 or 1.
A copolymer of tetrafluoroethylene and monomer having the formula ##STR30##
A copolymer of tetrafluoroethylene and monomer having the formula ##STR31##
A membrane comprising a polymer made from a monomer wherein said monomer has the general formula:
- ##STR32## wherein X is C, CH or N, Z is a Group IA element, calcium, magnesium, strontium, or barium, R.sub.f is a perfluoroalkylene group chosen from the group consisting of a perfluoroalkylene, a perfluoroalkylene containing one or more ether groups, a perfluoroalkylene containing one or more sulfonyl groups, and a perfluoroalkylene containing ether and sulfonyl groups, R.sub.f, is C.sub.n F.sub.2n+1 (n=0, 1, 2, . . .10), Y is C.sub.n F.sub.2n+1 (n=0, 1, 2, . . .10) and m is 0 or 1.
A copolymer of tetrafluoroethylene and monomer having the general formula:
- ##STR33## wherein X is C, CH or N, Z is a Group IA element, calcium, magnesium, strontium, or barium, R.sub.f is a perfluoroalkylene group chosen from the group consisting of a perfluoroalkylene, a perfluoroalkylene containing one or more ether groups, a perfluoroalkylene containing one or more sulfonyl groups, and a perfluoroalkylene containing ether and sulfonyl groups, R.sub.f, is C.sub.n F.sub.2n+1 where n is 0 or an integer greater than 0, Y is C.sub.n F.sub.2n+1 where n is 0 or an integer greater than 0 and m is 0 or 1.
A membrane comprising a polymer made from a monomer wherein said monomer has the general formula:
- ##STR34## wherein X is C, CH or N, Z is a Group IA element, calcium, magnesium, strontium, or barium, R.sub.f is a perfluoroalkylene group chosen from the group consisting of a perfluoroalkylene, a perfluoroalkylene containing one or more ether groups, a perfluoroalkylene containing one or more sulfonyl groups, and a perfluoroalkylene containing ether and sulfonyl groups, R.sub.f, is C.sub.n F.sub.3n+1 where n is 0 or an integer greater than 0, Y is C.sub.n F.sub.2n+1 where n is 0 or an integer greater than 0 and m is 0 or 1.
Dependencies are inferred from the claim text.