Activation behavior and dielectric relaxation in polyvinyl alcohol and multiwall carbon nanotube composite films

被引：30
|
作者：
Chakraborty, G. [1 ]
Meikap, A. K. [1 ]
Babu, R. [2 ]
Blau, W. J. [2 ]
机构：
[1] Natl Inst Technol, Dept Phys, Durgapur 713209, W Bengal, India
[2] Univ Dublin Trinity Coll, Dept Phys, Dublin 2, Ireland
来源：
SOLID STATE COMMUNICATIONS | 2011年 / 151卷 / 10期
关键词：
Polyvinyl alcohol; Multi walled Carbon nanotubes; Chemical synthesis; Electric modulus; MECHANICAL-PROPERTIES; POLYMER; CONDUCTIVITY; NANOCOMPOSITES; SPECTROSCOPY; POLYANILINE; FIBERS;
D O I：
10.1016/j.ssc.2011.03.013
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The dc and ac electrical transport property of Polyvinyl Alcohol-Multiwall Carbon Nanotubes (PVA-MWNT) composites has been investigated within a temperature range 77 <= T <= 300 K and in the frequency range 20Hz-1MHz. The temperature variation of dc conductivity gives the presence of two different activation energies. The dielectric properties of the samples have been explained in terms of electric modulus vector. The dielectric relaxation has been explained in terms of interfacial polarization occurring in between the insulating PVA matrix and MWNT conductive filler. The variation of the relaxation time with temperature also indicates the presence of two different activation energies. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：754 / 758
页数：5
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