Thermally Stimulated Depolarization Current analysis to the determination of polarization and relaxation parameters in aged PMMA

被引：5
|
作者：
Hdiji, S. [1 ]
Namouchi, F. [1 ]
Medhioub, H. [1 ]
Guermazi, H. [1 ]
Guermazi, S. [1 ]
Castellon, J. [2 ]
Agnel, S. [2 ]
Toureille, A. [2 ]
机构：
[1] Inst Preparatoire Etud Ingn Sfax, Unite Rech Phys Mat Isolants & Semi Isolants, BP 1172, Sfax 3018, Tunisia
[2] Univ Montpellier II, Inst Electron sud, Grp Energie & Materiaux, F-34097 Montpellier, France
来源：
2ND INTERNATIONAL CONFERENCE ON MATERIALS PHYSICS AND APPLICATIONS (JIPMA 2009/MATERIAUX 2009) | 2010年 / 13卷
关键词：
METHACRYLATE); TSDC; POLYMER;
D O I：
10.1088/1757-899X/13/1/012018
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Thermally Stimulated Depolarization Current (TSDC) technique has been extensively used to study the main and secondary relaxations process in various materials, such as polymers. In this work, samples of amorphous polar poly(methyl methacrylate) (PMMA) are submitted to a particular thermal aging with different durations, and then TSDC measurements are made. Theoretical model is applied for the analysis of complex TSDC spectra for aged PMMA samples. The polarization was determined for each aged PMMA sample, as a sum of single depolarization process contribution. The different relaxation mechanisms are recognized and their relative contributions to the polarization of polymer are evaluated. The obtained results show that the thermal aging affects slightly the primary and the secondary, dipolar relaxations and more strongly the space charges relaxation.
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页数：8
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