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Process for making cation exchange membranes with enhanced electrochemical properties

  • US 5,876,571 A
  • Filed: 05/09/1997
  • Issued: 03/02/1999
  • Est. Priority Date: 05/10/1996
  • Status: Expired due to Fees
First Claim
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1. A process for making a cation exchange membrane comprising:

  • impregnating a film of highly fluorinated sulfonyl fluoride polymer with a compound having the formula R-SO2 F, wherein R is a straight chain, branched or cyclic, highly fluorinated alkyl group having 1 to 30 carbon atoms;

    irradiating said film after impregnating with said compound, said irradiating being carried out to provide a radiation dose in the range of about 0.1 to about 15 MRad; and

    hydrolyzing said film after said irradiating.

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