Dielectric properties of solution-grown-undoped and acrylic-acid-doped ethyl cellulose

Khare, P. K.; Jain, Sandeep Kumar

doi:10.1007/bf02708605

Cited by 32 publications

(14 citation statements)

References 17 publications

(21 reference statements)

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“…The effect of doping with acrylic acid on the discharge current indicates the formation of molecular aggregates. Khare and Jain [249,250] found that the location of the DRS peak is comparable with that of the α-peak in TSDC spectra of acrylicacid-doped ethyl cellulose. Localization of side groups, the effects of polymer length, tacticity and polymerization degree can be analysed from the TSDC data accompanied by investigations with thermal analysis techniques [251][252][253][254][255].…”

Section: Relaxation Phenomena In Polymersmentioning

confidence: 79%

TSDC spectroscopy of relaxational and interfacial phenomena

Gun'ko

Zarko

Goncharuk

et al. 2007

Advances in Colloid and Interface Science

132

167

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Section: Relaxation Phenomena In Polymersmentioning

confidence: 79%

TSDC spectroscopy of relaxational and interfacial phenomena

Gun'ko

Zarko

Goncharuk

et al. 2007

Advances in Colloid and Interface Science

132

167

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“…. Due to its electrical insulating properties, EC has been used in many applications including cable lacquers and plastics . Recently, EC has been used in nanocomposite hybrid materials for different applications .…”

Section: Introductionmentioning

confidence: 99%

Processing, Dynamic mechanical thermal analysis, and dielectric properties of barium titanate/cellulosic polymer nanocomposites

et al. 2015

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High dielectric constant BaTiO 3 /ethyl cellulose (BT/EC) nanocomposites having BT loadings of up to 13 vol% were fabricated through a simple casting technique. The BT filler powder, synthesized through an ultrasonicassisted solid-state route, was revealed by X-ray powder diffractometry (XRD) and Raman spectroscopy to be dominantly tetragonal. Scanning electron microscopy (SEM) showed good dispersion of the BT nanoparticles in the EC polymer matrix at lower BT concentrations. However, at higher concentrations, the BT particles form a continuous phase or a "filler network" leading to weak BT/EC interactions. This finding is well supported by the results of the tensile strength and storage modulus. The dielectric properties of the BT/EC nanocomposites were investigated over wide ranges of frequency and temperature. The addition of BT significantly increased the permittivity (e 0 ) and dielectric loss (e 00 ) and improved the ionic conductivity of the EC. The electric modulus (M 00 ) results were analyzed in terms of the Havriliak-Negami function through three distinct relaxation mechanisms (namely a, b*, and b relaxations) in the temperature range 30-1508C. The dc conductivity (r dc ) results suggest that the BT/EC nanocomposites formed at low BT loading (up to 7.0 vol%) and a temperature of £ 608C are good candidates for antistatic applications while those formed at higher concentrations and temperatures are recommended for use in electrostatic dissipation applications.

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“…The polarization of a dielectric is contributed by the ionic, electronic, and dipole polarizations [48,49].…”

Section: Dielectric Studymentioning

confidence: 99%

Influence of nickel ion-doped mullite composite on electrical properties, phase behavior, and microstructure of poly(vinylidene fluoride) matrix

et al. 2016

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Novel mullite-polymer composite films were prepared by incorporating highly crystallized nickel ion-doped mullite, which acts as filler into polyvinylidene matrix. Various analytical tools had been utilized at room temperature to study the effects of filler on microstructure, phase transformation, and electrical properties of the polymer films. X-ray diffraction spectra (XRD) and Fourier transform infrared spectroscopy (FTIR) confirm the changes of electroactive phase in polyvinylidene fluoride (PVDF) matrix. Two basic factors, which affected the phase transition of the polymer, were (i) the concentration of the dopant ion into the mullite and (ii) the temperature at which doped mullite were sintered. β-phase percentage of doped polymer was found to reach optimum level for the sample doped with nickel ion at concentration of 0.8 M, when sintered at both 1100 and 1400°C. Electrical properties were studied over a wide range of frequency (from 200 Hz to 2.0 MHz). The composite film showed maximum dielectric constant of 35.77, at 200 Hz for 1.2 M concentration of nickel ion-doped mullite sintered at 1400°C, compared to 9.10, for the pure polymer. Furthermore, both dielectric constant and electrical conductivity of the composite were also highly dependent upon dopant concentration inside filler and frequency of the AC field. The AC conductivity of the developed composite increased with an increase in temperature by following Jonscher's power law, while the electrical resistivity reduced accordingly. Field emission scanning electron microscope (FESEM) characterization study showed the uniform distribution of doped mullite embedded inside the polymer matrix. Moreover, the results reflected that this novel composite material is able to follow the galloping pace of development of the smaller electronic devices, which are highly indebted to the development of very small size (microlevel/ nanolevel) as well as efficient new-generation semiconductor materials.

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Dielectric properties of solution-grown-undoped and acrylic-acid-doped ethyl cellulose

Cited by 32 publications

References 17 publications

TSDC spectroscopy of relaxational and interfacial phenomena

TSDC spectroscopy of relaxational and interfacial phenomena

Processing, Dynamic mechanical thermal analysis, and dielectric properties of barium titanate/cellulosic polymer nanocomposites

Influence of nickel ion-doped mullite composite on electrical properties, phase behavior, and microstructure of poly(vinylidene fluoride) matrix

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