Studies of Water in Nafion Membranes: Using Deuteron and Oxygen‐17 Nuclear Magnetic Resonance, and Dielectric Relaxation Techniques

Deuteron and oxygen‐17 nuclear magnetic resonance measurements and dielectric relaxation studies of Nafion‐117 membranes with variable water content (approximately 5–18% by weight) have been carried out. Glassy behavior of the water domains at low temperature, below ca. 200 K, is evidenced by the specific nature of the 2H NMR line shapes. Activation energies extracted from 2H spin‐lattice relaxation data on the high temperature side of the T1 …