Abstract
Abstract13C cross polarization and magic‐angle spinning (CPMAS) NMR studies were made on poly(ethylene oxide) (PEO) complexed wit LiClO4, NaClO4, BaSCN, Bal2 and Ba(ClO4)2. The proton and carbon spin‐lattice relaxation times in a rotating frame (T1ρH, T1ρC) as well as the rate of cross polarization were measured at room temperature. For Ba(ClO4)2 the measurements were made with different polymer molar masses and salt concentrations. The changes in relaxation behaviour indicate changes in polymer chain mobility as well as strong interaction between ions and PEO chains. The T1ρH and T1ρC decrease with decreasing salt concentration towards the relaxation times of the pure polymer. Nonexponential relaxation behaviour was found for the samples according to the T1ρC and TCH measurements.
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