Spin probe ESR studies of PEG<SUB>x</SUB>LiCIO<SUB>4</SUB> polymer electrolyte systems
- Bhat, Shrivalli N.
- Sharma, Ajay
- Rao, S. S.
- Bhat, S. V.
DOIAbstract
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 PEG46LiClO4 temperature dependence of correlation time is found. The glass transition temperature Tg is estimated to be -51 °C from the measurement of T50G, the temperature at which the extrema separation 2AZZ becomes 50G and is found to be close to that measured using DSC (-51.7° C). Tg for pure PEG-2000, which could not be measured from DSC because of its high crystallinity, is determined to be -72°C by spin probe ESR
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