DocumentCode :
52771
Title :
Pressure effect on the polymer electret films
Author :
Viraneva, A. ; Yovcheva, T. ; Mekishev, G.
Author_Institution :
Fac. of Phys. & Eng. Technol., Plovdiv Univ., Plovdiv, Bulgaria
Volume :
20
Issue :
5
fYear :
2013
fDate :
Oct. 2013
Firstpage :
1882
Lastpage :
1886
Abstract :
Polypropylene (PP), poly(lactic acid) (PLA) and poly(ethylene terephthalate) (PET) samples, charged in a positive or in a negative corona were studied. The charging of the samples in a corona discharge was carried out by means of a conventional corona triode system. After charging the surface potentials were measured using the method of the vibrating electrode with compensation and then the electrets were placed into a vacuum chamber under different low pressures from 10 Pa to 105 Pa for 30 minutes. The effect of lower pressure on the surface potential of charged samples was investigated. It was established that the reduced pressure led to the surface potential decay of the electrets. The results obtained of polypropylene, poly(ethylene terephthalate) and poly(lactic acid) electrets show that charge decay is different for different polarity of the corona voltage and for different materials. The same effect was earlier observed for other polymer films. Processes of desorption from the electrets surface accompanied with surface diffusion are supposed to occur.
Keywords :
corona; electrets; polymer films; surface potential; charged samples; conventional corona triode system; corona discharge; desorption; electrets surface; negative corona; poly(ethylene terephthalate); poly(lactic acid); polymer electret films; polymer films; polypropylene; positive corona; pressure effect; surface diffusion; surface potential decay; surface potentials; vacuum chamber; vibrating electrode; Corona; Electrets; Electric potential; Electrodes; Films; Polymers; Surface treatment; Electrets; corona poling; polymer films; pressure effects;
fLanguage :
English
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
Publisher :
ieee
ISSN :
1070-9878
Type :
jour
DOI :
10.1109/TDEI.2013.6633720
Filename :
6633720
Link To Document :
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