Thermally stimulated depolarisation current measurements and interpretation [polymer glass transition studies]

The fictive thermodynamic equilibrium temperature T_fi determined from thermal investigation (differential scanning calorimetry, for example) and the compensation temperature T_c introduced in thermally stimulated depolarisation current measurements are compared. A brief description is given of the experimental apparatus of TSDC measurements built in the authors´ laboratory, and the main parameters and results obtained from the two methods (DSC and TSDC) are given. An interpretation of the experimental equality observed between the experimental values of the thermodynamic equilibrium temperature T _fi obtained from DSC investigations and the temperature compensation T_c introduced in TSDC measurements is proposed