Dielectric and morphological properties of PAni-DBSA blended with polystyrene sulfonic acid

被引：15
|
作者：
Costa, L. C. [1 ,2 ]
Rubinger, C. P. L. [1 ]
Martins, C. R. [3 ]
机构：
[1] Univ Aveiro, Dept Phys, P-3810193 Aveiro, Portugal
[2] I3N, P-3810193 Aveiro, Portugal
[3] Univ Fed Pernambuco, CCEN, Fundamental Chem Dept, BR-50740540 Recife, PE, Brazil
来源：
SYNTHETIC METALS | 2007年 / 157卷 / 22-23期
关键词：
polyaniline; polystyrene sulfonic acid; impedance spectroscopy; dielectric relaxation;
D O I：
10.1016/j.synthmet.2007.09.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Polyaniline (PAni) doped with organic protonic and polymeric acids shows better solubility and processability by conventional methods. In this work, we report the results of polyaniline doped with dodecylbenzenesulfonic acid (PAni-DBSA) and reprocessing with polystyrene sulfonic acid (PSS) in an internal mixer, to obtain a conductive polymer blend (PAni-DBSA/PSS). Impedance spectroscopy, scanning electron microscopy and infrared spectroscopy of the samples were evaluated. Significantly different morphologies were observed for PAni-DBSA and PAni-DBSA/PSS complexes. The effect of different degrees of doping with DBSA and the influence of PSS on the dielectric properties of PAni were investigated by impedance spectroscopy in frequency range 10 Hz-30 MHz. The different complexes present two dielectric relaxation processes suggesting two types of chain structure. We show that DBSA improves the doping range of the PAni/PSS complexes and the homogeneity of the blends. (c) 2007 Elsevier B.V. All rights reserved.
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页码：945 / 950
页数：6
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