Enhancement of dielectric and energy density properties in the PVDF‐based copolymer/terpolymer blends

Ullah, Amir; Rahman, Abdur; Ahn, Chang Won; Rahman, Muneeb-Ur; Ullah, Aman; Rehman, Zia ur; Iqbal, Muhammad; Kim, Ill Won

doi:10.1002/pen.24083

Cited by 36 publications

(19 citation statements)

References 39 publications

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“…Taking a step forward, the idea of incorporating a secondary polymer as compatibilizer to facilitate the interaction/dispersion of nanofiller in the base polymer , or forming a polymer blend matrix as a nanostructured template to effectively host the nanofiller have been examined recently especially in the context of HV applications. Blends of thermoplastic elastomers with polyolefins have also been investigated recently.…”

Section: Introductionmentioning

confidence: 99%

Dielectric Relaxation Dynamics of Clay‐Containing Low‐Density polyethylene Blends and Nanocomposites

Eesaee

David

Demarquette

2020

Polymer Engineering & Sci

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Series of clay-containing nanocomposites have been prepared and investigated using frequency-domain dielectric spectroscopy at different temperatures. Different matrix materials have been used: neat low-density polyethylene (LDPE) with and without compatibilizer and co-continuous blends of LDPE with two grades of polystyrene-b-poly(ethylene-co-butylene)-b-polystyrene (SEBS) copolymers. Two major relaxation modes were detected in the dielectric losses of all the nanocomposites and associated with Maxwell-Wagner-Sillars interfacial polarization and dipolar relaxation, respectively. Characteristic relaxation rates, activation energies, dielectric strength, and shape parameters of these relaxation mechanismes were calculated and discussed for the LDPE/clay nanocomposites. The addition of compatibilizer was found to slightly increase the dielectric loss of the nanocomposites while slowing the dynamics due to an improved dispersion. When combined with a high loading of nanofiller (15%), the compatibilizer addition led to lowfrequency dispersion. A new relaxation process was then observed for the nanocomposites with the blend matrix. Several speculations were made as to the origin of this phenomenon, all of which were related to the SEBS phase. POLYM. ENG. SCI., 60:968-978, 2020.

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Section: Introductionmentioning

confidence: 99%

Dielectric Relaxation Dynamics of Clay‐Containing Low‐Density polyethylene Blends and Nanocomposites

Eesaee

David

Demarquette

2020

Polymer Engineering & Sci

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“…The slope of the parallel line is related to the conductance and the intercept of the current axis is determined by the capacitance of PVDF, as indicated by Eq. (8). Anyway, by using the compensation method, we can focus on the pure polarization contribution in PVDF and further study its parameter dependences.…”

Section: Compensated Hysteresis Loop Of Poled Pvdfmentioning

confidence: 99%

“…Since the discovery of its piezoelectricity, PVDF has been widely utilized in electromechanical actuators, biomedical applications, high electric energy density capacitors, self‐powered electronics, and shock pressure gauges . Recently, the PVDF‐based copolymers are another promising electroactive materials in energy‐harvesting devices, as multifunctional portable sensors .…”

Section: Introductionmentioning

confidence: 99%

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Polarization study of poly(vinylidene fluoride) films under cyclic electric fields

Qin

Zhang

Zheng

et al. 2020

Polymer Engineering & Sci

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Poly(vinylidene) fluoride (PVDF) is a prototypical piezoelectric polymer, which exhibits a strong piezoelectricity after a poling treatment. In this work, we investigate the polarization behaviors of PVDF film under cyclic electric fields by measuring polarized currents. A compensation method is used to distinguish the polarized current from the capacitive and resistive currents. The PVDF samples with a thickness of 20 or 30 μm and an electrode area of 3 × 3 or 4 × 4 mm2 are employed, respectively. From the observations, we find that the electrode area does not affect the current density, but a thicker film has a higher residual polarization due to its larger fraction of effective switchable dipoles. The amplitude of the applied field primarily determines the residual polarization. Impressively, an α‐ to β‐phase transformation occurs above 225 MV · m−1 and the polarized current reaches the maximum and becomes converges at 350 MV · m−1. Moreover, a high degree and reproducible residual polarization is obtained through gradually increasing applied field from 50 to 350 MV · m−1, and the relative standard deviation is 3.74% for 20 available samples. Furthermore, a dipole switching model is used to describe the polarization behaviors of PVDF with a form of f(E) = Ae−B|E + C| and the fitting parameters give a further illustration of polarization behaviors in PVDF. POLYM. ENG. SCI., 60:645–656, 2020. © 2020 Society of Plastics Engineers

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“…PMMA is one of the few polymers that can be miscible with PVDF‐based polymer. By mixing a small amount of PMMA with P(VDF‐TrFE‐CFE) terpolymers, the breakdown field can be increased without significantly reducing the polarization response . As a result, the energy storage performance of the terpolymers can be improved using the blend approach.…”

Section: Dielectric Materials Based On Pvdf‐based Polymers For Energymentioning

confidence: 99%

High Energy Density Dielectrics Based on PVDF‐Based Polymers

Liu

et al. 2018

Energy Tech

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Many applications, such as hybrid vehicles, pulsed power generators, and power factor correction, require capacitors with high energy density to reduce the size or weight of the related systems. For these applications, dielectric film capacitors are often used because of their fast discharge speed and high power density. The energy density of commercial available film capacitors is relatively low and cannot meet the demands for those applications. In the past decade, different polymer‐based dielectric materials have been intensively investigated to improve the energy density of the materials. Here, the progress in developing high energy density polymer‐based dielectric materials is reviewed, and strategies to improve the energy density of dielectric polymers are summarized and discussed. Because polyvinylidene fluoride (PVDF)‐based polymers have relatively high dielectric properties and have been intensively studied for the energy storage applications, the discussion focuses mainly on PVDF‐based polymers and composites. An outlook for the future directions and problems that will be tackled to further improve the energy density of dielectrics is also provided.

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Enhancement of dielectric and energy density properties in the PVDF‐based copolymer/terpolymer blends

Cited by 36 publications

References 39 publications

Dielectric Relaxation Dynamics of Clay‐Containing Low‐Density polyethylene Blends and Nanocomposites

Dielectric Relaxation Dynamics of Clay‐Containing Low‐Density polyethylene Blends and Nanocomposites

Polarization study of poly(vinylidene fluoride) films under cyclic electric fields

High Energy Density Dielectrics Based on PVDF‐Based Polymers

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