Title :
Thermal stability of polarization structures in corona-charged P(VDF-HFP) copolymer films
Author :
Gorokhovatsky, Y.A. ; Boitzov, V.G. ; Rychkov, D.A.
Author_Institution :
Dept. of Gen. & Exp. Phys., Herzen State Pedagogical Univ., St. Petersburg, Russia
Abstract :
The trapping of charge carriers in localized states on the surface of β-crystallites in P(VDF-HFP) films has been studied by means of a novel voltage recovery technique. It has been found that a phase transition from α-non polar to the δ-polar configuration takes place under the process of charge injection. Using experimental measurements and appropriate analysis, we determine the energy distribution of the traps located near the β-crystallites surfaces, and estimate the spatial dimensions of the molecular dipoles to be about 11-12 nm. The industrial application method was suggested in order to improve the thermal stability of charge and polarization in corona-charged copolymer films.
Keywords :
charge injection; corona; crystallites; dielectric polarisation; electron traps; polymer blends; polymer films; polymer structure; solid-state phase transformations; surface charging; surface states; thermal stability; α-nonpolar/δ-polar configuration transition; β-crystallites; 11 to 12 nm; charge carriers; charge injection; corona-charged P(VDF-HFP) copolymer films; corona-charged copolymer films; energy distribution; localized states; molecular dipoles; phase transition; polarization structure; spatial dimensions; surface; thermal stability; trapping; voltage recovery technique; Charge carriers; Electrets; Electrodes; Energy measurement; Frequency estimation; Heating; Physics; Polarization; Thermal stability; Voltage;
Conference_Titel :
Electrets, 2002. ISE 11. Proceedings. 11th International Symposium on
Print_ISBN :
0-7803-7560-2
DOI :
10.1109/ISE.2002.1042962
