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High Pressure NMR and Electrical Conductivity Studies of Acid Form NAFION Membranes.
Interim technical rept.,
HUNTER COLL NEW YORK
Pagination or Media Count:
The effect of high pressure on the electrical conductivity and proton, deuteron and 17O NMR in acid form NAFION-117 conditioned at various levels of relative humidity has been determined. NMR measurements of T1 were carried out as a function of pressure up to 0.25 GPa. The complex impedance studies were made along the plane of the film at frequencies from 10 to 10exp 8 Hz at room temperature and pressures up to 0.3 GPa. The electrical conductivity and proton and deuteron NMR measurements show that the activation volume for materials containing greater than about 3 water molecules per sulfonate is 2 to 3cu cmmol and larger values are found as the amount of water decreases. The implications of these results are discussed. The 170 NMR results are unexplained at the present time. NAFION, High Pressure NMR, High Pressure Conductivity
APPROVED FOR PUBLIC RELEASE