Study of charge relaxations after thermal aging in poly (methyl methacrylate)

被引：8
|
作者：
Namouchi, F. [1 ]
Smaoui, H. [1 ]
Guermazi, H. [1 ]
Fourati, N. [2 ]
Zerrouki, C. [2 ]
Agnel, S. [3 ]
Toureille, A. [3 ]
Bonnet, J. J. [2 ]
机构：
[1] Inst Preparatoire Etud Ingenieurs Sfax, Unite Rech Phys Mat Isolants & Semiisolants, BP 805, Sfax 3018, Tunisia
[2] Conservatoire Natl Arts & Metiers, Lab Phys, F-75003 Paris, France
[3] Univ Montpellier 2, Lab Electrotech Montpellier, F-34095 Montpellier, France
来源：
PROCEEDINGS OF THE JMSM 2008 CONFERENCE | 2009年 / 2卷 / 03期
关键词：
PMMA; thermal aging; TSDC; charge relaxation; POLY(METHYL METHACRYLATE); SPACE CHARGES; SPECTROSCOPY; IRRADIATION; TSDC;
D O I：
10.1016/j.phpro.2009.11.050
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Effects of thermal aging on physico-chemical and electrical properties of polymethyl methacrylate (PMMA) are reported in this paper. PMMA samples are submitted to successive heat-cooling cycles (Tmin = 20 degrees C and Tmax = 90 degrees C) in the ambient air, each cycle lasts 12h. Different techniques are thus employed to investigate structural modifications, dielectric relaxations and conduction processes. These are the Fourier Transform Infrared (FTIR) spectroscopy, thermal step method (TSM), thermally stimulated depolarization currents (TSDC), dielectric spectroscopy (DS) and current-voltage technique. Results are discussed and a relationship between structural modifications and charge relaxations was emphasized. We demonstrated that thermal aging favors oxidation phenomenon. Three distinguishable charge relaxations (beta, alpha and rho) have been highlighted by TSDC. (c) 2009 Elsevier B. V. All rights reserved
引用
收藏
页码：961 / 970
页数：10
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