NMR INVESTIGATION OF P(EO)(LICLO4)X

We present a NMR investigation of poly(ethylene oxide)-lithium perchlorate [P(EO)(LiClO4)x] for x = 0.125. Measurements of the spin-lattice relaxation times vs. temperature of H-1 and Li-7 nuclei were performed both in the laboratory and rotating frames (T1 and T1-rho. The most remarkable feature is the lack of any significant difference between the H-1 and Li-7 relaxation behaviour. The temperature dependence of both the lithium and proton correlation times is shown to be similar to the corresponding behaviour of the conductivity. It is then clearly stated that the microscopic motion of the Li+ cations is essentially governed by the segmental motion of the chain.