Spatial distribution of polarization in corona poled P(VDF-TFE) films

Influence of annealing conditions on elastic and dielectric properties of P(VDF‐TrFE) copolymer and its composites

“…We assume, that compensating charges induce an additional mechanism at surfaces of crystallites in which charges and dipoles are mutually attracted, therefore producing high remnant polarization, as reported elsewhere . Although a high electret component can affect negatively stability of piezoelectric coefficients . Contributions of the electret and the ferroelectric components to formation of the single peak at 330 K still require more elucidation.…”

“…The less thermally stable peak is referred to the electret component and can be caused by a reorientation of aligned dipoles in amorphous phase . Due to a high degree of crystallinity of the copolymer (Table ) and a higher amplitude of the negative peak at 339 K, the TSD current can be related to the ferroelectric component in crystalline phase . On the other hand, the composite containing 1 vol% CNT showed similar to the aforementioned discharge behavior already on the first TSDC heating.…”

“…The neat copolymer also showed two negative peaks at 308 K and 339 K in the second TSDC measurement. From the direction of the peaks we concluded, that they correspond to dipolar disorientation or ion displacement within the P(VDF‐TrFE) sample . The less thermally stable peak is referred to the electret component and can be caused by a reorientation of aligned dipoles in amorphous phase .…”

“…From the direction of the peaks we concluded, that they correspond to dipolar disorientation or ion displacement within the P(VDF‐TrFE) sample . The less thermally stable peak is referred to the electret component and can be caused by a reorientation of aligned dipoles in amorphous phase . Due to a high degree of crystallinity of the copolymer (Table ) and a higher amplitude of the negative peak at 339 K, the TSD current can be related to the ferroelectric component in crystalline phase .…”