Abstract
In this paper, the effect of polarity on the volume conductivity of Kapton and polyethylene (PE), determined using the corona triode method, when the sample current depends linearly on grid potential, was studied. For the determination of volume conductivity, in addition to the analytical method, for the first time, a graphical method is presented as well. According to the experimental results, obtained by both methods, the volume conductivity values of negative corona charged samples were higher than those of the samples charged by positive corona. Considering the different nature of positive and negative coronas, these differences in results are to be expected and are in full accordance with the theoretical considerations as well. On the other hand, the good agreement between the analytical method results and those obtained by the graphical method, indicates high accuracy of the proposed analytical formula. Meanwhile, the satisfying accordance of experimental results with those found by the classical “static” and “dynamic” methods, confirms the accuracy of the corona method, for the determination of volume conductivity of polymers.
Highlights
IntroductionKapton and PE, that are ideally suited for various applications in different industries due to their electrical, physical, and mechanical properties combination, were chosen as subject of this study [1] [2]
According to the experimental results, obtained by both methods, the volume conductivity values of negative corona charged samples were higher than those of the samples charged by positive corona
The volume conductivity of Kapton and PE is determined by the corona triode method, described in details in [7]
Summary
Kapton and PE, that are ideally suited for various applications in different industries due to their electrical, physical, and mechanical properties combination, were chosen as subject of this study [1] [2]. The volume conductivity is considered to be a parameter of great importance among the electrical properties of polymers. In addition to the classic “static” methods (system of electrodes) [3] [4], and the “dynamic” methods, based on electron-beam irradiation effect, in thin polymeric films [5] [6], traditionally used to determine the volume conductivity, the corona triode method [7] [8] has resulted to be very effective as well. The effect of the corona polarity on volume conductivity of Kapton and PE, determined by the corona triode method, when the sample current depends linearly on grid potential, is studied
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