This work deals with a comparison of data obtained from differential scanning calorimetry (DSC) and thermally stimulated depolarization current (TSDC) investigations. Measurements were performed on various poly(ethylene terephthalate) films: a wholly amorphous, a thermally crystallized and drawn samples.
For each specimen, the TSDC complex spectra, resolved into elementary ones, led to the determination of the classical compensation temperature (Tc). The glass transition temperature (Tg) and the fictive equilibrium temperature (Tf) were determined by means of DSC. It appears thatTc is different fromTg and very close toTf.