1. Analyses of Behaviour of PP Corona Electrets Stored at Low Pressure.
- Author
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Viraneva, A. P., Yovcheva, T. A., Pisanova, E. S., Gencheva, E. A., and Mekishev, G. A.
- Subjects
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CORONA discharge , *DIELECTRICS , *ELECTRETS , *POLYPROPYLENE , *THERMOPLASTICS - Abstract
Polypropylene electrets 20 μm thick charged in a negative corona were studied. The samples were charged to different initial surface potentials and were stored under various pressures for 30 minutes. Then, the surface potential was again measured. The dependence of the electret surface potential on the pressure, under which the electrets were kept after charging, was investigated. As the pressure was lowered from 1000 mbar to 0.1 mbar a sharp decay of the surface potential occurred. It was established that a main parameter determining the surface potential decay is the ratio of the pressure to initial surface potential, and only one generalized curve describes all results obtained. Analyses of the equation described the results obtained was done. [ABSTRACT FROM AUTHOR]
- Published
- 2010
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