Study of relaxations in epoxy polymer by thermally stimulated depolarization current (TSDC) and dielectric relaxation spectroscopy (DRS)
| Autor: | Alain Toureille, Hichem Smaoui, S. Agnel, Hajer Guermazi, Mourad Arous |
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| Rok vydání: | 2010 |
| Předmět: |
Arrhenius equation
Materials science Mechanical Engineering Metals and Alloys Thermodynamics Depolarization Epoxy Conductivity symbols.namesake Nuclear magnetic resonance Mechanics of Materials Electrical resistivity and conductivity visual_art Materials Chemistry visual_art.visual_art_medium symbols Relaxation (physics) Ionic conductivity Glass transition |
| Zdroj: | Journal of Alloys and Compounds. 489:429-436 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2009.09.116 |
| Popis: | Thermally stimulated depolarization current (TSDC) and dielectric relaxation spectroscopy (DRS) techniques were employed to study the relaxations and the conductivity phenomena in epoxy-based polymer. In addition to the primary α relaxation process associated with the glass–rubber transition, significant interfacial relaxation and ionic conduction process have been revealed. The ac conductivity is temperature and frequency dependent and shows a dc plateau at low frequencies. Above the glass transition temperature, dc conductivity is described by a Vogel–Tamman–Fulcher–Hesse (VFTH) equation while it shows Arrhenius behaviour at higher temperatures. |
| Databáze: | OpenAIRE |
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