Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Patent
1977-11-10
1978-09-12
Mack, John H.
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
H01M 810
Patent
active
041139224
ABSTRACT:
This disclosure is directed to fluorocarbon polymers, polymeric membranes, and electrochemical cells and processes. The polymers and membranes are produced by radiation techniques to provide improved products. For example, .alpha.,.beta.,.beta.-trifluorostyrene in an inert organic solvent is grafted onto an inert film, such as tetrafluoroethylene-hexafluoropropylene copolymer, by irradiation, i.e. with Co-60 gamma radiation at a dose of several Mrad. The grafted film is then sulfonated, preferably in a chlorosulfonic acid bath. The resulting film is useful as a membrane or diaphragm in various electrochemical cells such as chlor-alkali or fuel cells.
REFERENCES:
patent: 3592695 (1971-07-01), Moran
Cook, Jr. Edward H.
D'Agostino Vincent F.
Lee Joseph Y.
Feeley H. A.
Hooker Chemicals & Plastics Corp.
Mack John H.
Rai Research Corporation
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