Modeling microwave dielectric properties of polymer composites using the interphase approach

Nioua, Yassine; Bouazzaoui, S. El; Achour, M. E.; Costa, L.C.

doi:10.1080/09205071.2017.1348261

Cited by 8 publications

(5 citation statements)

References 24 publications

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“…This indicates that, considering the interphase zone in these composite materials, we have a significant effect on the DC electrical conductivity: Table resumes the results. It is clear that the percolation threshold and interphase fraction of series A are higher than those of series B, which indicates that these dispersion parameters depend on the conducting filler type . The value of conductivity of interphase region that has been calculated for series A is higher than that of series B, confirming the experimental data, because the neat conductivity of carbon black used in series A is higher than that of series B.…”

Section: Resultssupporting

confidence: 72%

Prediction of filler/matrix interphase effects on AC and DC electrical properties of carbon reinforced polymer composites

et al. 2017

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This study predicts the effect of the conducting filler/ insulating matrix interphase on the electrical properties of two series of percolated systems, differing from the type of carbon black particles mixed in an aminecured epoxy matrix, diglycidylic ether of bisphenol F. To take into account the interactions between the conducting filler and the matrix, as well as filler-filler overlapping, we introduce three parameters, characteristic of the interphase zone, such as concentration, conductivity and volume, on the generalized effective medium (GEM) model for DC and AC electrical conductivities. These interphase parameters, characterizing the boundary of the shaded zone between the macromolecular chain and the conducting particles, depend on the filler type and concentration. One output of GEM-modified model is that it provides a mean to estimate the volume, concentration and intrinsic conductivity of the interphase in a composite by fitting the experimental data over a broad range of frequency.

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Section: Resultssupporting

confidence: 72%

Prediction of filler/matrix interphase effects on AC and DC electrical properties of carbon reinforced polymer composites

et al. 2017

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“…However, on reinforcement of MgO NP, the value of Z′ decreased tremendously. The value of real impedance (Z′) drops with increasing frequency for all samples and tends to merge at a higher frequency range due to the likely release of space charges [45].…”

Section: Impedance Spectroscopic Analysismentioning

confidence: 98%

Dielectric Properties of PVA/MgO Polymer Nanocomposite Films

KUMAR,

et al. 2024

Preprint

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The polymer nanocomposites (PNC) films using MgO and PVA were prepared by solution casting method. XRD, FTIR, and EDX investigations performed in combination gave detailed insights into the structural, chemical and elemental properties of the MgO-PVA composite along with the purity of the sample. The SEM images provide evidence for an even distribution of MgO nanoparticles in the prepared sample. The influence of MgO nanoparticle concentration on the ac conductivity and dielectric properties of nanocomposite films has been investigated. The values of both the real part (εʹ) and the imaginary part (εʹʹ) of the dielectric constant and ac-conductivity of PVA film have been observed to increase with increasing MgO concentration. At higher frequencies, the prepared PNC films exhibit a low dielectric value and behave as a lossless material. Thus, the findings of this study offer valuable insights that can be utilized for designing and assessing the performance of materials and devices across diverse fields, ultimately leading to advancements in electrical engineering and related disciplines.

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“…Heterogeneous polymers and emulsions are widely used in daily life and industrial production. Their physical properties are inextricably linked to the compositional characteristics of the continuous and discrete phases [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Modification of the Maxwell–Wagner Heterogeneous Dielectric Model for Heterogeneous Polymers and Emulsions

Qian

Yan

et al. 2022

Polymers

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In heterogeneous polymers and emulsions, the volume fraction of the discrete phase and the frequency of electromagnetic waves affect the accuracy of the dielectric model. The integral method was used to modify the Maxwell–Wagner (M–W) heterogeneous dielectric theory, and a new model for the complex dielectric constant of polymers and emulsions was established. The experimental data were compared with the results of the M–W heterogeneous dielectric integral modification model and other theoretical models for different frequencies and volume fractions of the discrete phase. We discovered that with a decreasing volume fraction of the discrete phase, the dominant frequency range of the integral modification model expanded. When the volume fraction of the discrete phase is 10%, the dominant frequency range reaches 3 GHz. When the volume fraction of the discrete phase is 1%, the dominant frequency range reaches 4 GHz. When the volume fraction of the discrete phase is 0.06%, the dominant frequency range of the real part reaches 9.6 GHz, and the dominant frequency range of the imaginary part reaches 7.2 GHz. These results verify the advantages of the M–W modification model, which provides a theoretical basis to study the dielectric properties of polymers and emulsions, as well as for microwave measurement.

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Modeling microwave dielectric properties of polymer composites using the interphase approach

Cited by 8 publications

References 24 publications

Prediction of filler/matrix interphase effects on AC and DC electrical properties of carbon reinforced polymer composites

Prediction of filler/matrix interphase effects on AC and DC electrical properties of carbon reinforced polymer composites

Dielectric Properties of PVA/MgO Polymer Nanocomposite Films

Modification of the Maxwell–Wagner Heterogeneous Dielectric Model for Heterogeneous Polymers and Emulsions

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