Study of Relaxations in Poly(methyl methacrylate)-Magneto Electrets by Thermally Stimulated Depolarization Current and Surface-Charge-Decay Mechanisms

被引：1
|
作者：
Tewari, A. S. [1 ]
Qureshi, M. S. [1 ]
Dubey, R. N. [1 ]
Malik, M. M. [1 ]
机构：
[1] Natl Inst Technol, Dept Phys, Bhopal 462051, India
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2011年 / 122卷 / 01期
关键词：
activation energy; charge transfer; functionalization of polymers; glass transition; kinetics (polym.); MAGNETO-ELECTRET; IRRADIATION; PMMA;
D O I：
10.1002/app.33645
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The effect of the forming temperature and the magnetic field was investigated for the charge retention and stability of poly(methyl methacrylate) (PMMA)-magneto electret (ME) samples with thermally stimulated discharge currents (TSDCs) and a surface-charge-decay mechanism. The measurements were performed on a pristine PMMA sample with a thickness of 20 mm. The comparative studies of charge decay with TSDC indicated a strong resemblance between the results of the two techniques of MEs of PMMA and were characterized by two TSDC peaks, that is, an alpha peak at 110 degrees C and a rho peak at 160 degrees C. The low-temperature peak (i.e., the alpha peak) was associated with dipolar relaxation, and the high-temperature peak (i.e., the rho peak) was attributed to the self-motion of space charges in PMMA. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 122: 29-34, 2011
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页码：29 / 34
页数：6
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