ELECTROMAGNETIC ABSORPTION OF POLYANILINES AT MICROWAVE-FREQUENCIES

被引:16
作者
DECHANTERAC, H [1 ]
RODUIT, P [1 ]
BELHADJTAHAR, N [1 ]
FOURRIERLAMER, A [1 ]
DJIGO, Y [1 ]
AEIYACH, S [1 ]
LACAZE, PC [1 ]
机构
[1] UNIV PARIS 07,CNRS,URA 34,INST TOPOL & DYNAM SYST,F-75221 PARIS 05,FRANCE
关键词
D O I
10.1016/0379-6779(92)90306-4
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Chemically synthesized emeraldine base polymer was treated with HCI to yield different levels of protonation corresponding to ad, values ranging from 10(-7) to 10(2) S/m. For different sigma(dc) values, broad-band absorption of electromagnetic waves was measured in the range 1 MHz-20 GHz at room temperature. A quasi linear relationship was observed between log sigma and log omega above 100 MHz, confirming the power law sigma = omega(s) (0 < s < 1). For the most conductive samples (sigma(dc) = 10(2) S/m, s = 0) corresponding to highly protonated polymers, the conductivity was shown to be constant and independent of frequency. With d.c. conductivities lower than 10(-1) S/m, s increased from zero to unity.
引用
收藏
页码:183 / 192
页数:10
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