Structural and frequency-dependent dielectric properties of PVP-SiO2-TMSPM hybrid thin films

Shahbazi, Maryam; Bahari, Ali; Ghasemi, Shahram

doi:10.1016/j.orgel.2016.02.012

Cited by 51 publications

(14 citation statements)

References 37 publications

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“…The electric modulus spectra are frequently used to confirm the bulk properties of a composite material because these spectra are free from the effects of electrode polarization (EP), electrode–dielectric contact and adsorbed impurities . The real part M′ and imaginary part M″ of the complex electric modulus for (PVA–PVP)– x wt% Al 2 O 3 films, at 30°C, are depicted in Fig.…”

Section: Resultsmentioning

confidence: 99%

Structural, morphological, thermal, dielectric, and electrical properties of alumina nanoparticles filled PVA–PVP blend matrix‐based polymer nanocomposites

Choudhary

2018

Polymer Composites

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Alumina (Al2O3) nanoparticles filled poly(vinyl alcohol) (PVA) and poly(vinyl pyrrolidone) (PVP) blend matrix (50/50 wt%) based polymer nanocomposite (PNC) films (i.e., [PVA–PVP]–x wt% Al2O3; x = 0, 1, 3, and 5) have been prepared by solution‐cast method. X‐ray diffraction study has confirmed that the structures of these PNC materials are predominantly amorphous. The formation of miscible blend, polymer–polymer and polymer–nanoparticle interactions, and the effect of Al2O3 nanoparticles on the thermal properties of PVA–PVP blend matrix have been examined by Fourier transform infrared, differential scanning calorimetry and scanning electron microscopy measurements of the PNC films. The dielectric and electrical spectra of these PNC films have been measured from 20 Hz to 1 MHz using dielectric relaxation spectroscopy. It has been found that the dispersion of merely 1 wt% Al2O3 nanoparticles in the PVA–PVP blend matrix significantly reduces the crystalline phase and enhance the melting phase transition temperature of the PNC material, while the dielectric permittivity greatly decrease due to nano confinement effect. The real parts of dielectric permittivity and the impedance of these PNC films decrease linearly with the increase of the frequency, whereas the ac electrical conductivity has increased. A nonlinear increase of dielectric permittivity has been found with an increase of the temperature of PNC film and its dc electrical conductivity obeys the Arrhenius behavior. The dielectric and electrical properties of these PNC materials confirm their suitability as flexible nanodielectric of frequency tunable permittivity. POLYM. COMPOS., 39:E1788–E1799, 2018. © 2018 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Structural, morphological, thermal, dielectric, and electrical properties of alumina nanoparticles filled PVA–PVP blend matrix‐based polymer nanocomposites

Choudhary

2018

Polymer Composites

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“…The variations in dielectric constant at lower frequencies attained from the existence of interface polarization. It is because of the presence of impurities, surface space charge and orientation of dipoles [34,35]. In our studies, the DE value of hybrid is increased by eightfold due to the presence of polarizable groups in the polymer.…”

Section: Resultsmentioning

confidence: 52%

Thermally Stable and Processable Organic-Inorganic Hybrid Material

Gopalan¹,

Francis²

2018

Asian J. Chem.

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“…31 Although there is an inconsistent peak position of tan δ and Z /M , as reported, the peak position of M is more appropriate for evaluating the relaxation time distribution. 26,32 One can see that the relaxation frequency has a high-frequency shift with the increase of bismuth composition rather than the number of bismuth cycles, proving the dominant place of Bi-O dipoles in the relaxation process of the Bi x Al y O z composite films.…”

Section: Impedance and Modulus Spectroscopymentioning

confidence: 95%

“…26 Fig. 3(a) shows the frequency dependence of ε r and loss factor (tan δ) of the Bi x Al y O z films with various bismuth contents.…”

Section: Dielectric Constant and Loss Factormentioning

confidence: 99%

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Influence of composition on structure, morphology and dielectric properties of BixAlyOz composite films synthesized by atomic layer deposition

Qiao

Lin

et al. 2017

AIP Advances

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Structural and frequency-dependent dielectric properties of PVP-SiO2-TMSPM hybrid thin films

Cited by 51 publications

References 37 publications

Structural, morphological, thermal, dielectric, and electrical properties of alumina nanoparticles filled PVA–PVP blend matrix‐based polymer nanocomposites

Structural, morphological, thermal, dielectric, and electrical properties of alumina nanoparticles filled PVA–PVP blend matrix‐based polymer nanocomposites

Thermally Stable and Processable Organic-Inorganic Hybrid Material

Influence of composition on structure, morphology and dielectric properties of BixAlyOz composite films synthesized by atomic layer deposition

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