Conductivity relaxation of polyaniline

Lee, Hsun‐Tsing; Liao, Chien‐Shiun; Chen, Show‐An

doi:10.1002/macp.1993.021940903

Cited by 31 publications

(11 citation statements)

References 13 publications

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“…The increment in permittivity with decrease of frequency reveals that the systems exhibit strong interfacial polarization at low frequency. As reported by the other authors (Lee et al 1993& Muhammad et al 2005) the strong low frequency dispersion for ε' and no loss peak for ε" are characteristics of charged carrier systems (Bluma et al 2006). …”

Section: Variation Of Ac Conductivity With Frequencysupporting

confidence: 55%

AC conductivity and dielectric behavior of poly (o-phenylenediamine)/TiO2 nanocomposites

Archana¹

2017

IJAC

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Poly (o-phenylenediamine) and their nanocomposites with TiO2 nanoparticles were synthesized using oxidative polymerization technique and the polymer nanocomposites were characterized using spectral techniques like FT-IR, UV-VIS spectroscopy and the morphology have been analyzed by XRD, SEM and TEM. The stability of the prepared polymer nanocomposites was studied using TGA, DTA and found to have high thermal stability. The study of ac conductivity, dielectric property revealed that the formed nanocomposites are semiconducting in nature and can be widely used in the field of energy storage and semiconductor devices, in diodes, batteries etc.

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Section: Variation Of Ac Conductivity With Frequencysupporting

confidence: 55%

AC conductivity and dielectric behavior of poly (o-phenylenediamine)/TiO2 nanocomposites

Archana¹

2017

IJAC

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“…It is believed that the ionic conduction in the low frequency region may mask any relaxation and these peaks are overlapped by DC conductivity contribution. Therefore, a modulus representation of dielectric loss is used to clearly point out the loss peaks attributed to interfacial polarization relaxation process [28, 29].…”

Section: Resultsmentioning

confidence: 99%

Dielectric, FTIR spectroscopic and atomic force microscopic studies on polypyrrole‐poly(acrylonitrile‐co‐vinyl acetate) composites

et al. 2011

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In this study, Poly(acrylonitrile‐co‐vinyl acetate) [P(AN‐co‐VAc)] composite films were fabricated by chemical polymerization of pyrrole (Py) with cerium(IV) (Ce(IV)) on P(AN‐co‐VAc) matrix. The effect of amount of Py and temperature on the composite film properties was studied in a frequency range starting from 0.05 Hz to 10 MHz and in a temperature range from 0 to 250°C. The electric modulus provides a good description of the dielectric relaxation of the conducting polymer composites. The atomic force microscopy images of the polypyrrole (PPy)‐P(AN‐co‐VAc) composites show the polymerization of Py on P(AN‐co‐VAc) matrix producing different sized grainy orientations resulting in higher conductivity values that increase with average grain size. The real [(ε′) or ε′(ω)] and imaginary [(ε″) or ε″(ω)] parts of the permittivity of PPy‐P(AN‐co‐VAc) composite were comparatively higher than PPy‐Polyacrylonitrile (PAN) and P(AN‐co‐VAc). It was also seen that the conductivity of PPy‐P(AN‐co‐VAc) composite was considerably higher than PPy‐PAN and P(AN‐co‐VAc) itself. POLYM. COMPOS., 2011. © 2011 Society of Plastics Engineers

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“…The relaxation of an electric field in a charge carrier system results from the carrier hopping over potential barriers, which leads to short‐range ac conductivity and long‐range dc conductivity. The conductivity relaxation in conjugated polymers arises due to the different of carrier hopping from that of dielectric relaxation . The analysis of conductivity relaxation in the synthesized PEDOT nanotubes system is carried out using the modulus formalism as formulated by Macedo et al :

M^{*} = \frac{1}{ε^{*}} = \frac{1}{ε^{'} - i ε^{″}} = \frac{ε^{'}}{ε^{' 2} + ε^{″ 2}} + i \frac{ε^{″}}{ε^{' 2} + ε^{″ 2}} = M^{'} + i M^{″}

where M ′( ω ) and M ″( ω ) are the real and imaginary parts of the complex electric modulus M *, respectively.…”

Section: Resultsmentioning

confidence: 99%

Dielectric and conductivity relaxation in poly(3,4‐ethylenedioxythiophene) nanotubes

Chutia

Kumar

2016

Polymer Engineering & Sci

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The charge carriers relaxation dynamics in synthesized poly(3,4‐ethylenedioxythiophene) nanotubes has been investigated as a function of frequency and temperature through the framework of dielectric permittivity, modulus formalism and impedance formalism. The fitting of experimental data of real part of dielectric permittivity and imaginary part of modulus with Havriliak‐Negami equation and Bergman modified Kohlrausch‐Williams‐Watts function indicates the presence of non‐Debye type relaxation process in the synthesized poly(3,4‐ethylenedioxythiophene) nanotubes. The scaling of imaginary part of modulus and impedance formalisms have been performed to understand the charge carrier relaxation dynamics in the synthesized samples, which suggests the presence of time temperature superposition principle in the nanotubes. The red shifting of the band from 1440 cm−1 to 1430 cm−1 in micro‐Raman spectra indicates the conformational transition from benzenoid to quinoid structure with increasing dopant concentration. The linear increase of imaginary part of dielectric permittivity with decreasing frequency is ascribed to the higher contribution from dc conductivity as compared to that from the electrode polarization effects. POLYM. ENG. SCI., 56:448–457, 2016. © 2016 Society of Plastics Engineers

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Conductivity relaxation of polyaniline

Cited by 31 publications

References 13 publications

AC conductivity and dielectric behavior of poly (o-phenylenediamine)/TiO2 nanocomposites

AC conductivity and dielectric behavior of poly (o-phenylenediamine)/TiO2 nanocomposites

Dielectric, FTIR spectroscopic and atomic force microscopic studies on polypyrrole‐poly(acrylonitrile‐co‐vinyl acetate) composites

Dielectric and conductivity relaxation in poly(3,4‐ethylenedioxythiophene) nanotubes

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