Electrical relaxations in polymeric particulate composites of epoxy resin and metal particles

被引：212

作者：

Psarras, GC ^{[1
]}

Manolakaki, E ^{[1
]}

Tsangaris, GM ^{[1
]}

机构：

[1] Natl Tech Univ Athens, Sch Chem Engn, Dept Mat Sci & Engn, GR-15780 Athens, Greece

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2002年 / 33卷 / 03期

关键词：

interface; permittivity;

D O I：

10.1016/S1359-835X(01)00117-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Composites of epoxy resins and nickel particles in various amounts were prepared and their dielectric spectra were measured in the frequency range 5 Hz-13 MHz and temperature interval from ambient to 140degreesC. The formalism of electric modulus proved to be efficient in analysing and interpreting obtained data. For these composites two relaxation processes are revealed in the frequency range and temperature interval of the measurements. One is an interfacial dielectric relaxation (Maxwell-Wagner-Sillars), MWS and the other is a conductivity relaxation. They both follow the Cole-Davidson approach with the exponent gamma reflecting a distribution of relaxation times with the characteristics of each process. AC conductivity of these composites is frequency and temperature dependant, it generally follows the exponential law sigma(ac) similar to omega(s) and reveals a conductivity relaxation process, in the low frequencies. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：375 / 384

页数：10

共 44 条

[1]

[Anonymous], J APPL POLYM SCI

[2]

BAKR AA, 1977, EUR POLYM J, V13, P799

[3] DIELECTRIC-PROPERTIES OF ALUMINUM POWDER EPOXY-RESIN COMPOSITES [J].

BAZIARD, Y ;

BRETON, S ;

TOUTAIN, S ;

GOURDENNE, A .

EUROPEAN POLYMER JOURNAL, 1988, 24 (06) :521-526

[4]

Boettcher C. J. F., 1978, THEORY ELECT POLARIZ, V2, P485

[5]

Bordewijk P., 1978, THEORY ELECT POLARIZ, V2, P476

[6]

Bottger H., 1985, HOPING CONDUCTION SO, V41, P169

[7]

BUNDE A, 1991, FRACTALS DISORDERED, pCH2

[8] CONDUCTIVITY RELAXATION AND CHAIN MOTIONS IN CONJUGATED CONDUCTING POLYMERS - NEUTRAL POLY(3-ALKYLTHIOPHENE)S [J].

CHEN, SA ;

LIAO, CS .

MACROMOLECULES, 1993, 26 (11) :2810-2816

[9]

CHOY TC, 1999, EFFECTIVE MEDIUM THE, pCH1

[10]

DELMONTE J, 1987, HIST POLYMERIC COMPO, P16

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