| Title |
Charge Accunmulation Characteristics in LDPE |
| Authors |
서광석 ; 김은주 ; Tatsuo Takada(Tatsuo Takada) ; 이승형 ; 공종수 |
| Keywords |
Polythylene ; Space Charge ; Internal Charge Distribution ; PEA(Pulsed Electroacoustic) Method ; charge Accumulation ; Homocharge ; Heterocharge ; Charge Injection |
| Abstract |
Charge accumulation characteristics in low density polyethylene (LDPE) has been discussed based upon the internal charge distrubution measured by the pulsed electroacoustic technique. When the negative voltage with respect to earth is applied to the upper electrode, the negative charges near the anode and the positive charges near the cathode are accumulated in LDPE. Also, there was an asymmetric behavior of charge accumulation exhibiting that the charge accumulation near the anode keeps increasing whereas that near the cathode increases first and then decreases. Besides, under the present test conditions the internal charge distrubution becomes stabilized eventually. When the positive voltage with respect to earth is applied to the upper electrode, on the other hand, no such asymmetric charge accumulation was found. Therefore, it can be concluded that the heterocharges are accumulated at the surface region of LDPE subjected to high do voltages and that the begavior of charge accumulation depends on the polarity of do voltage and the position of charge accumulation. |