Preparation and Electrical Properties of Conducting     Polyaniline-Polycarbonate Composite Films

Yin, Xi; Yoshino, Katsumi; Hashizume, Kenichi; Isa, Isao

doi:10.1143/jjap.36.3537

Cited by 56 publications

(7 citation statements)

References 8 publications

(2 reference statements)

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“…The intensity of this band decreases rapidly once the polymer gets undoped. The band at 819 cm 21 confirms that the rings are joined in the polymer chain through para linkage. On recording the FTIR spectra of the polymer heated at 200 and 250 8C, sharp shifts in the characteristic bands of polyaniline has been observed (Fig.3, curves b and c).…”

Section: Ftir Analysismentioning

confidence: 66%

“…Similarly the peak at 1490 cm 21 observed for polyaniline at room temperature shifts to 1503 and 1518 cm 21 when the polyaniline is heated at 200 and 250 8C. The main characteristic strongest peak of polyaniline observed at 1141 cm 21 at room temperature gets shifted to 1161 cm 21 with a strong intensity when the polymer is heated at 200 8C, but shows a feeble signal at 1138 cm 21 when the polymer is heated at 250 8C. This shows that at 250 8C, the dopant moiety attached to polymer backbone completely comes out leading to weak signal of the characteristic band of the polymer.…”

Section: Ftir Analysismentioning

confidence: 74%

“…In the range 1650 -1400 cm 21 , bands due to aromatic ring breathing mode, N -H deformation and C -N stretching are observed. Bands at 1581 and 1490 cm 21 are the characteristic bands of nitrogen quinoid and benzenoid ring and are present in the doped polymer matrix. These bands show a blue shift on removal of the dopant from the polymer.…”

Section: Ftir Analysismentioning

confidence: 98%

“…On recording the FTIR spectra of the polymer heated at 200 and 250 8C, sharp shifts in the characteristic bands of polyaniline has been observed (Fig.3, curves b and c). The peak at 1581 cm 21 gets shifted to 1622 and 1630 cm 21 when the polymer sample is heated at 200 and 250 8C, respectively. This implies that at higher temperatures the polymer gets converted from benzenoid form to quinoid form.…”

Section: Ftir Analysismentioning

confidence: 98%

“…These bands show a blue shift on removal of the dopant from the polymer. The strong absorption band at 1141 cm 21 in the doped polyaniline matrix is due to the charge delocalization in the polymer backbone [30]. The intensity of this band decreases rapidly once the polymer gets undoped.…”

Section: Ftir Analysismentioning

confidence: 99%

See 4 more Smart Citations

Electromagnetic shielding behaviour of conducting polyaniline composites

Dhawan

Singh

Rodrigues

2003

Science and Technology of Advanced Materials

208

107

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The paper reports the designing and development of conducting polyaniline composites which show a shielding effectiveness of 4 -58 dB against electromagnetic interference at 101 GHz range, depending upon the loading of the conducting polyaniline in polystyrene and polymethylmethaacrylate matrix. The composites can be used for the dissipation of static charge. A static decay time of the order of 0.11 -0.02 s for the conducting polyaniline composites is observed when the charge is reduced from 5000 to 500 V. q

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Section: Ftir Analysismentioning

confidence: 66%

Section: Ftir Analysismentioning

confidence: 74%

Section: Ftir Analysismentioning

confidence: 98%

Section: Ftir Analysismentioning

confidence: 98%

Section: Ftir Analysismentioning

confidence: 99%

See 3 more Smart Citations

Electromagnetic shielding behaviour of conducting polyaniline composites

Dhawan

Singh

Rodrigues

2003

Science and Technology of Advanced Materials

208

107

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Role of Metal Phthalocyanine in Redox Complex Conductivity of Polyaniline and Aniline Black

Xavier¹,

Inigo²,

Goldsmith

1999

J. Porphyrins Phthalocyanines

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Polyaniline (PA) and aniline black (AB) were prepared in powder form by the chemical method of oxidative polymerization, from which free-standing thin films were obtained by solvent evaporation using N-methyl pyrrolidinone ( NMP ). The thin films contained 2, 4, 6 or 8 wt% AB. Electrical measurements showed that the samples containing 4% AB exhibited the highest photoconductivity of the four concentrations. Thus there appears to be a critical ratio of PA to AB for maximum photoconductivity. Annealing up to 570 K has little effect on the conductivity. Upon adding a small quantity of copper phthalocyanine ( CuPc ) to the PA + AB, the electrical conductivity increased considerably and the optical absorption was extended from the UV to the near IR. The electrical conductivity mechanism is a consequence of a redox process, since AB is the oxidized state of PA and, upon illumination, there is an exchange of charge carriers. The extension of the range of optical absorption upon addition of CuPc is interpreted to suggest that CuPc photosensitizes the material and enhances the carrier transport process in the redox couple. The activation energy from the temperature-dependent conductivity and the band gap from the electrolyte electroreflectance method were determined. The activation energy for 0.4% CuPc is lowest (0.52 eV) and the corresponding band gap is determined to be 3.0 eV. This organic compound could be a good candidate for inexpensive, reliable and efficient solar energy-converting devices.

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Systematic evaluation of the preparation of conducting PANI/ABS blends

Cristovan

Lemos

Pereira

2009

J of Applied Polymer Sci

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Films of blended poly(acrylonitrile-butadiene-styrene) (ABS) and polyaniline (PANI) were produced by codissolving both components in a common organic solvent, which was then evaporated. The influence of the preparation conditions on the properties of the blends was analyzed by factorial design. The factors evaluated were the PANI content in the blend, the m-cresol to chloroform solvent ratio, the dopant used (dodecylbenzenesulfonic acid (DBSA) or camphor sulfonic acid) and its concentration, and the acrylonitrile content in the ABS. The responses analyzed were the flexibility and electrical conductivity of the blends. The results showed that the PANI content in the blend and the acrylonitrile content in the ABS were the major factors influencing both of the assessed responses. The dopant affected only the conductivity, DBSA being preferred for the development of more conductive PANI/ABS blends. The solvent ratio did not have any influence, owing to the uniform expanded coil conformation expected for PANI molecules at the studios ratios. After the best conditions had been established, a percolation threshold study was performed that pointed to a low threshold of 3 wt % PANI necessary in the blend, giving a flexible blend with a conductivity of 3 S/cm.

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Preparation and Electrical Properties of Conducting Polyaniline-Polycarbonate Composite Films

Cited by 56 publications

References 8 publications

Electromagnetic shielding behaviour of conducting polyaniline composites

Electromagnetic shielding behaviour of conducting polyaniline composites

Role of Metal Phthalocyanine in Redox Complex Conductivity of Polyaniline and Aniline Black

Systematic evaluation of the preparation of conducting PANI/ABS blends

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