Dielectric Properties of Polyethylene Oxide Doped with NH4I Salt

Ayesh, Ayman S

doi:10.1295/polymj.pj2009047

Cited by 21 publications

(23 citation statements)

References 24 publications

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“…In the continuity of our ongoing studies 1,15 –19 into the MWCNTs with different neat polymers such as polystyrene, polycarbonate, and so on, in the present study, a novel dispersion behavior of MWCNTs was obtained through pretreatment of MWCNTs at different pH values. In our previous work, 1 we functionalized MWCNTs with β-HNA and observed that β-HNA molecules adsorb onto the surface of MWCNTs due to inherent hydrophobic/hydrophilic sites and create electrostatic charge on the surface.…”

Section: Introductionmentioning

confidence: 80%

“…Besides, commercial thermoplastic polymer such as polyethylene (PE), polypropylene (PP), poly (vinyl alcohol) ( PVA), polyvinyl chloride (PVC) ….etc are the mostly and widely used plastic in the industrial applications because they are cheap, durable, hard, and easily worked. 1 –20 Despite of the extensive studies 1 –27 of such materials, multiwalled carbon nanotubes (MWCNTs)-polymer nanocomposites, many important aspects of the electronic and optical properties of these materials are still not fully resolved. Consequently, it will be very interesting to study the effect of pretreatment of MWCNTs using a new method to improve their dispersion in neat polymer to obtain polymer nanocomposites that have attractive properties for industrial applications.…”

Section: Introductionmentioning

confidence: 99%

“…Researcher’s community has devoted a large amount of efforts and times into the synthesis of MWCNTs-polymer nanocomposites with different techniques. 5 –25 Data from the literature reveal that the dispersion of MWCNTs in polymers and particularly PVA matrix can be enhanced by functionalizing MWCNTs using acid treatment (wet chemical method), dry oxidation such as the use of ozone in the presence of ultraviolet (O 3 /UV) or simply by the addition of additives. In addition to this, sonication and other physical mixing methods have been reported to enhance the dispersion of MWCNTs in polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

“…The dispersion of MWCNTs in the matrix contributes a pivotal role in the electrical and other physical properties of the resultant thin films. 1,15 –25…”

Section: Introductionmentioning

confidence: 99%

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Electrical and optical properties of well-dispersed MWCNTs/PVA nanocomposites under different pH conditions

Farrag

Abdel‐Rahem

Ibrahim

et al. 2018

Journal of Thermoplastic Composite Materials

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Series of polymer nanocomposites films consisting of pretreated multiwalled carbon nanotubes (PT-MWCNTs) and poly (vinyl alcohol) (PVA) were prepared at room temperature. The MWCNTs were initially pretreated with 1.0 M sulfuric acid (PT-MWCNTs) and then allowed to disperse in aqueous solutions at different pH values (2–14). It was found that the dispersion of the PT-MWCNTs is a pH dependent. The best PT-MWCNTs dispersion was obtained at pH = 10. Films of PT-MWCNTs/PVA, at this optimum pH-value, were then prepared by casting technique at different PT-MWCNTs weight fractions. The resulted PT-MWCNTs/PVA films were characterized through the direct visualization, Fourier transform infrared, and morphology test. Besides, current–voltage and direct current electrical conductivity for PT-MWCNTs/PVA nanocomposites at 60°C showed that the conductivity mechanism was ohmic and the percolation threshold was around 0.8 wt% PT-MWCNTs. Optical results showed that PT-MWCNTs are homogeneously distributed in the neat PVA and optical gap is significantly decreased from 4.40 to 2.96 eV.

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Section: Introductionmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The dispersion of MWCNTs in the matrix contributes a pivotal role in the electrical and other physical properties of the resultant thin films. 1,15 –25…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electrical and optical properties of well-dispersed MWCNTs/PVA nanocomposites under different pH conditions

Farrag

Abdel‐Rahem

Ibrahim

et al. 2018

Journal of Thermoplastic Composite Materials

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“…This indicates that, at the domain frequency range, the relaxation process is due to viscoelastic relaxation process. 23,26,27 …”

Section: Rheological Propertiesmentioning

confidence: 99%

Dielectric relaxation and rheological properties of single-walled carbon nanotubes reinforced poly(3-octylthiophene-2,5-diyl)

Abu-Abdeen

Ayesh

Aljaafari

2011

Journal of Thermoplastic Composite Materials

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Polymer nanocomposites consisting of single-walled carbon nanotubes (SWCNTs) and poly(3-octylthiophene-2,5-diyl) (P3OT) were prepared at different SWCNT loadings to investigate the influence of SWCNT content on the structure, dielectric and rheological properties of P3OT host. The dielectric parameters and dielectric relaxation behavior were investigated as a function of SWCNT loadings and frequency. Dielectric results reveal that SWCNTs enhance the polar character of P3OT host, shift the peak maximum of loss tangent toward higher frequency values and increase the alternating current conductivity especially above the percolation threshold point. Besides, the rheological properties of SWCNT-P3OT composites were also investigated to realize the effect of SWCNT content on the complex viscosity, storage and loss moduli at different frequency values. The obtained results reveal that nanocomposites become electrically percolated at 0.44 wt% SWCNTs, while the rheological percolation threshold was found at 0.5 wt%. Additionally, this study showed that the relaxation behavior in SWCNT-P3OT composites is mainly due to the viscoelastic relaxation process. Moreover, at high level of SWCNT loadings, the nanotubes became more interconnected to form network like structures in the P3OT host. Finally, results obtained from structure-property analysis reveal that the addition of SWCNTs to P3OT host reduced the vibrational freedom of the polymer chains as a consequence of the intercalation of the polymer matrix into the nanotubes.

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Dielectric relaxation studies of poly(ethylene oxide) with the addition of salt or nanofiller

Yusoff

Halim

Tarmizi

et al. 2023

Polymer International

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Poly(ethylene oxide) (PEO)–lithium perchlorate (LiClO4) serves as the classical model of polymer–salt systems with good polymer–salt molecular interaction at low salt concentration, whereas titanium dioxide (TiO2) without any surface treatment when added to PEO serves as a classical model of polymer–filler systems with weak polymer–filler molecular interaction. The correlation of molecular interactions of polymer–salt or polymer–filler with thermal properties of the systems, which govern the formation of morphologies of the systems, was attempted in a previous study. Hence, this work focuses on the correlation of morphologies and dielectric relaxation properties of PEO with the addition of LiClO4 or TiO2 investigated using polarized optical microscopy and electrochemical impedance spectroscopy over the frequency range from 50 Hz to 1 MHz at 25 °C. The effects of the addition of LiClO4 or TiO2 on the dynamics and relaxations of the polymer chain of PEO are discussed empirically following the fluctuation–dissipation effects from the common electrochemical terms and equivalent circuit model. The PEO–LiClO4 system seems to be one of the promising polymer electrolytes for application in lithium rechargeable batteries where the charged entities may arise from the interaction of salt with the ether oxygen of PEO in the amorphous region. Meanwhile, the PEO–TiO2 system may be analogous to a polar polymer with longitudinal dipoles along the PEO backbone, ethylene oxide monomers (from PEO) of which may represent the molecular dipole or charged entity. The findings show that the transport of charged entities in the PEO systems after the addition of LiClO4 or TiO2 is dominated by short‐range motion at room temperature. © 2022 Society of Industrial Chemistry.

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Dielectric Properties of Polyethylene Oxide Doped with NH4I Salt

Cited by 21 publications

References 24 publications

Electrical and optical properties of well-dispersed MWCNTs/PVA nanocomposites under different pH conditions

Electrical and optical properties of well-dispersed MWCNTs/PVA nanocomposites under different pH conditions

Dielectric relaxation and rheological properties of single-walled carbon nanotubes reinforced poly(3-octylthiophene-2,5-diyl)

Dielectric relaxation studies of poly(ethylene oxide) with the addition of salt or nanofiller

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