Factors that influence the surface potential decay on a thin film of polyethylene terephthalate (PET) |
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Authors: | Lazhar Herous Mohamed Nemamcha Mokdad Remadnia Lucian Dascalescu |
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Institution: | 1. Electrical Engineering Laboratory, University of Guelma, 24000 Guelma, Algeria;2. Laboratory of Aerodynamic Studies, UMR 6609, University of Poitiers, 86000 Poitiers, France |
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Abstract: | The initial potential at the surface of the sample, as well as the temperature and the relative humidity of the ambient air are known to influence the surface-potential decay characteristics of corona-charged thin insulating films. The aim of the present work is to demonstrate the effectiveness of the Experimental Design methodology for evaluating the effects of these factors. Thus, a full factorial experimental design was carried out on a thin film of polyethylene terephthalate (thickness: 0.5 mm; surface: 50 mm × 50 mm). A negative corona discharge produced in a needle–grid–plate electrode system was employed to charge the surface of the film samples. The variation domains for the three factors were respectively: ?1000 V to ?1800 V; 25 to 55 °C; 50% to 80%. The surface-potential decay process was characterized by two output variables: the time needed for the potential to reduce to respectively 50% and 10% of the initial value. It was found that the former is more affected by the temperature, while the latter is more sensitive to the variation of the relative humidity. |
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