ELECTRICAL-PROPERTIES OF POLYESTER ELASTOMER COMPOSITES CONTAINING METALLIC FILLERS

被引:36
作者
RADHAKRISHNAN, S
SAINI, DR
机构
[1] Polymer Science and Engineering, National Chemical Laboratory, Pune
关键词
D O I
10.1007/BF01130140
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The electrical properties, namely d.c. and a.c. conductivity, of polyester elastomer filled with various metallic and ferrite fillers have been investigated as a function of temperature, frequency and filler concentration. The temperature dependence of resistivity exhibited two regions of low and high activation energy (DELTA-E). The value of DELTA-E in the lower temperature region (I) decreased while in the higher temperature region (II) it increased with the increase of work function of the metal used. Only in the case of ferrite-filled composites could a positive temperature coefficient of resistance be observed. The frequency dependence of conductivity revealed that there is a very large intergranular capacitance which was even more in the case of ferrite-filled samples than in metal-filled ones. The various results have been explained on the basis of Schottky barrier formation and the depletion regions formed near the polymer-metal interface.
引用
收藏
页码:5950 / 5956
页数:7
相关论文
共 24 条
[1]   MEASUREMENTS OF THE MAGNEX DC CHARACTERISTICS AT MICROWAVE-FREQUENCIES [J].
BAKER, ZQ ;
ABDELAZEEZ, MK ;
ZIHLIF, AM .
JOURNAL OF MATERIALS SCIENCE, 1988, 23 (08) :2995-3000
[2]  
Bhattacharya S.K., 1986, METAL FILLED POLYMER
[3]   REVIEW ON METAL-FILLED PLASTICS .1. ELECTRICAL-CONDUCTIVITY [J].
BHATTACHARYA, SK ;
CHAKLADER, ACD .
POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING, 1982, 19 (01) :21-51
[5]  
HALL HE, 1979, SOLID STATE PHYS, P108
[6]  
JENKINS AD, 1972, POLYM SCI MATERIAL S, V2, P1312
[7]   ANOMALOUS BEHAVIOR OF ELECTRICAL-CONDUCTIVITY AND THERMAL NOISE IN CARBON BLACK-CONTAINING POLYMERS AT TG AND TM [J].
KLASON, C ;
KUBAT, J .
JOURNAL OF APPLIED POLYMER SCIENCE, 1975, 19 (03) :831-845
[8]   DYNAMIC PERCOLATION IN AN INSULATOR CONDUCTOR COMPOSITE - POLYETHYLENEOXIDE POLYPYRROLE, AS STUDIED BY AC, CONDUCTIVITY MEASUREMENTS [J].
KREMER, F ;
EZQUERRA, TA ;
MOHAMMADI, M ;
BAUHOFER, W ;
VILGIS, TA ;
WEGNER, G .
SOLID STATE COMMUNICATIONS, 1988, 66 (02) :153-157
[9]  
Mott N. F., 1979, ELECT PROCESSES NONC, V2nd ed.
[10]  
MOTT NF, 1982, ELECTRONIC PROCESSES