The windowing polarization technique and its possibilities in the study of conduction mechanisms in polymers

It can be observed in electrets of PET-A, using the windowing polarization technique and TSC (thermally stimulated current) spectroscopy, that the polar peak (α) and the peak of charge (ρ) show a maximum polarization at a certain temperature of polarization T_p=T_po. The peak α, for T_p>T_po, shows maxima at a temperature (T_m) that is constant versus T_p as long as P=f(1/T_p) is a linear function, and it is possible to calculate its effective energy of activation above the T_po. The peak ρ, for T_p>T_po, results in a plot of P=f(1/T_p) that is not linear, whereas T_m=f(T_p) is a linear and increasing function. The results obtained from PVC (polyvinyl chloride) and PMMA (polymethyl methacrylate) are compared and discussed