Polypyrrole/polyacrylonitrile composite films: Dielectric, spectrophotometric and morphologic characterization

Çetiner, Suat; Olariu, Marius; Ciobanu, Romeo Cristian; Karakas, Hale; Kalaoğlu, Fatma; Sarac, A. Sezai̇

doi:10.1007/s12221-010-0843-9

Cited by 13 publications

(10 citation statements)

References 25 publications

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“…In our previous studies [19, 20], conductive PAN composites were prepared by chemical polymerization of Py, N ‐methyl pyrrole, and N ‐phenyl pyrrole with Ce(IV) on PAN matrix. The effect of amount of the Py derivatives 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.…”

Section: Introductionmentioning

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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Section: Introductionmentioning

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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“…As the total conductivity increases with PUB loading, the exponent value s decreases. This indicates that cationic property of PUB takes important role to increase conductive network in PVA matrix [34]. The temperature-dependent s value for different composition has been shown in Fig.…”

Section: Electrical Performance Of Pva/pub Blend Systemmentioning

confidence: 78%

Synthesis and characterization of polyvinyl alcohol/cationic polyurethane binder blend as solid polymer electrolyte

Khutia

Joshi

Bhattacharya

2015

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In the present study, we have fabricated the blends of polyvinyl alcohol (PVA) and cross linked chain extended cationic polyurethane binder (PUB). X-ray diffraction (XRD) reveals that the crystallinity decreases with PUB loading. The hydrogen bonding of PVA and PUB are confirmed by shifting of C=O (1750-1700 cm −1 ) and N-H resign (1400-1380 cm −1 ) of Fourier transform infrared spectroscopy (FTIR) spectra. The optical properties of the blend system such as direct and indirect band gap were evaluated by UV absorption spectra. The band gap decreases with the loading of PUB. The miscibility of PUB and PVA blend has been confirmed by differential scanning calorimetry (DSC). It shows a decrease in glass transition (T g ) and decomposition temperature (T d ), and increase in melting temperature (T m ) with PUB loading. The plane morphology of blend was confirmed by scanning electron microscopy (SEM) with better homogeneity (for 50 % PUB loading). The frequency-dependent AC conductivity seems to follow Jonscher power law in which power factor (s) varies in the range 0.74

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“…The dielectric loss (imaginary permittivity) is a measure of how much energy is dissipated or lost by heat energy due to the presence of free electrons for conduction . Many researchers reported that drastic decrease of dielectric constant and dielectric loss for ICP composites . A slight decrease of dielectric constant and increase of dielectric loss with increasing frequency has been reported for CNT composites .…”

Section: Resultsmentioning

confidence: 99%

Single walled carbon nano tube ‐Polyaniline core‐shell/polyurethane polymer composite for electromagnetic interference shielding

et al. 2017

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Single Walled Carbon Nanotube‐Polyaniline core‐shell/polyurethane polymer composites (SWCNT‐PANI/PU) were prepared by a two‐step process. Initially, SWCNT‐PANI core‐shell was synthesized by in‐situ chemical oxidation. Later, polyurethane polymer composites were prepared by dispersing varying percentages of SWCNT‐PANI core‐shell as a filler into polyurethane. These composites exhibited a percolation threshold at 0.1 wt% filler loading. Percolation theory was applied to estimate the exact percolation threshold of composites. Maximum electrical conductivity 6.28 × 10−4 S cm−1 was realized at 3 wt% of filler loading. The enhancement of electrical conductivity was substantiated by FTIR, FESEM, XRD, and TGA. These results confirmed the interaction between SWCNT‐PANI core‐shell and polyurethane that was responsible for the enhanced electrical conductivity. Further, these polymer composites, as coatings were applied on to the GFRP substrates for evaluating the EMI shielding effectiveness. The coating properties viz. adhesion, scratch resistance and hardness were evaluated according to ASTM procedures and the EMI shielding effectiveness (EMISE) of the polymer composite in X‐band (8–12 GHz) and W‐band (75–110 GHz) frequencies was assessed by dielectric probe and free space methods respectively. Maximum EMISE of 11 dB in X‐band and 10 dB in W‐band was realized for 3 wt% SWCNT‐PANI core‐shell loaded PU polymer composite coating. POLYM. COMPOS., 39:4104–4114, 2018. © 2017 Society of Plastics Engineers

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Polypyrrole/polyacrylonitrile composite films: Dielectric, spectrophotometric and morphologic characterization

Cited by 13 publications

References 25 publications

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

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

Synthesis and characterization of polyvinyl alcohol/cationic polyurethane binder blend as solid polymer electrolyte

Single walled carbon nano tube ‐Polyaniline core‐shell/polyurethane polymer composite for electromagnetic interference shielding

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