Accession Number : ADA307202

Title :   Properties of Solid Polymer Electrolyte Fluorocarbon Film.

Descriptive Note : Technical note,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER

Personal Author(s) : Alston, William B.

PDF Url : ADA307202

Report Date : NOV 1973

Pagination or Media Count : 24

Abstract : The ionic fluorocarbon film used as the solid polymer electrolyte in hydrogen/oxygen fuel cells was found to exhibit delamination failures. Polarized light microscopy of as-received film showed a lined region at the center of the film thickness. It is shown that these lines were not caused by incomplete saponification but probably resulted from the film extrusion process. The film lines could be removed by an annealing process. Chemical, physical, and tensile tests showed that annealing improved or sustained the water contents, spectral properties, thermo-oxidative stability, and tensile properties of the film. The resistivity of the film was significantly decreased by the annealing process.

Descriptors :   *POLYMERS, *FILMS, *SOLID ELECTROLYTES, *HYDROGEN OXYGEN FUEL CELLS, TEST AND EVALUATION, THICKNESS, ANNEALING, POLARIZATION, STABILITY, WATER, LAMINATES, RESISTANCE, TENSILE PROPERTIES, LIGHT, FAILURE, EXTRUSION, THERMAL STABILITY, MICROSCOPY, SPECTRA, OXIDATION, DELAMINATION, MATERIAL SEPARATION, SAPONIFICATION NUMBER.

Subject Categories : Polymer Chemistry
      Inorganic Chemistry
      Organic Chemistry
      Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE