Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1974-12-23
1977-03-15
Mack, John H.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
204296, 429192, 260884, C25B 1308, H01M 810
Patent
active
040123030
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: 3298942 (1967-01-01), Magat
patent: 3341366 (1967-09-01), Hadgdon et al.
patent: 3839172 (1974-10-01), Chapiro
patent: 3878072 (1975-04-01), Cook
Cook, Jr. Edward H.
D'Agostino Vincent F.
Lee Joseph Y.
Feeley H. A.
Hooker Chemicals & Plastics Corporation
Mack John H.
Rai Research Corporation
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