Abstract
The technique of Electron Spin Resonance (ESR) is shown to be useful in the study of dynamics of solid polymer electrolytes (SPE). Through the ESR of the nitroxide radical (2,2,6,6-tetramethyl-1-piperidine-1-oxyl; TEMPO) dispersed in the SPE PEG(46)LiClO(4), temperature dependence of correlation time is found. The glass transition temperature T-g is estimated to be -51 degreesC from the measurement of T-50G the temperature at which the extrema separation 2A(ZZ) becomes 50G and is found to be close to that measured using DSC (-51.7 degreesC). T-g for pure PEG-2000, which could not be measured from DSC because of its high crystallinity, is determined to be -72 degreesC by spin probe ESR.
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