The Effect of Space charge on Isothermal and non-isothermal Currents in Polyethylene Naphthalate
| Autor: | Mohamed Saidi, M. Bendaoud, N. Saidi-Amroun, H. Oubouchou |
|---|---|
| Jazyk: | angličtina |
| Předmět: |
Anomalous charging current
Materials science Polymers Thermodynamics Electrical conduction Charge (physics) Dielectric Physics and Astronomy(all) Non-isothermal current Space charge Endothermic process Isothermal current Isothermal process Polyethylene naphthalate Dielectrics Crystallite Glass transition |
| Zdroj: | Physics Procedia. (3):1285-1290 |
| ISSN: | 1875-3892 |
| DOI: | 10.1016/j.phpro.2009.11.093 |
| Popis: | This paper presents an experimental results obtained by using three investigation methods. The temperature effect on space charge behavior, in semi crystalline polyethylene naphthalate (PEN), under electrical strength, was analyzed. The Anomalous charging current, which is generally attributed to space charge, was observed. The non-isothermal current exhibited two peaks one located at 130 ∘C near the glass transition temperature T g , and the other, which was associated to pre-melting of crystallites, at 150 ∘C. The DSC analyze showed a T g at 128 ∘C and an endothermic peak at 150 ∘C. From these results it can be concluded that the trapped space charge can not release from the sample and requires an increase of temperature. Above T g , the molecular motion facilitates the de-trapping of the charge. |
| Databáze: | OpenAIRE |
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