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Study of thermal aging effect on space charge in poly(methyl methacrylate) |
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| Authors: | F. Namouchi H. Guermazi C. Zerrouki S. Agnel J.J. Bonnet |
| Affiliation: | a Unité de Recherche “Physique des Matériaux Isolants et Semi-isolants”, Institut Préparatoire aux Etudes d’Ingénieurs de Sfax, BP 805, 3018 Sfax, Tunisia b Laboratoire d’Electrotechnique de Montpellier, Université Montpellier II, CC079, 34095 Montpellier Cedex 05, France c Laboratoire de Physique, Conservatoire National des Arts et Métiers, 2 rue Conté, F-75003 Paris, France |
| Abstract: | Charges evolution in poly(methyl methacrylate) (PMMA) samples under thermal aging effect has been studied by means of two complementary techniques, thermal step method (TSM) and thermally stimulated depolarization current (TSDC). For the first method, measurements reveal that injected charges, whose quantity is found depending on the number of applied temperature cycles, remain close to the surface sample. TSDC measurements have been carried out for different temperatures ranging from 25 °C to 140 °C. Three distinguishable dipolar relaxations (β1, β2 and α) have been highlighted. In the same way, the presence of polarization and injected charges has been confirmed. In support of electric characterization, X-ray reflectometry has been used. The obtained results equally emphasized the thermal aging effect on the material. |
| Keywords: | PMMA Trapped charges Thermal aging Thermal step current Thermally stimulated depolarization currents X-ray reflectometry |
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