Polyethylene/thermoplastic elastomer/Zinc Oxide nanocomposites for high voltage insulation applications: Dielectric, mechanical and rheological behavior

Helal, Emna; Pottier, Cyril; David, Éric; Fréchette, M.F.; Demarquette, Nicole R.

doi:10.1016/j.eurpolymj.2018.02.004

Cited by 58 publications

(30 citation statements)

References 57 publications

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“…This is related to the fact that nanoscale dispersion leads to lower percolation thresholds compared with microscale counterpart, which allows the onset of leakage current through the sample. A similar effect was observed in the case of zinc oxide containing dielectrics [24]. Epoxy resins (ER) are a common sight in polymer engineering.…”

Section: X23 Dielectric Responsesupporting

confidence: 58%

Dielectric Properties of Epoxy/POSS and PE/POSS Systems

David

Andritsch

2018

Polymer/Poss Nanocomposites and Hybrid Materials

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In many applications in electronic, power and high voltage engineering, there is a need to improve the electrical properties of existing insulation systems and/or to develop novel insulation materials with properties more suitable with the changing requirements, particularly in the electrotechnical area. During the last few decades, a considerable attention has been given to the possible use of polymeric nanocomposites systems, usually a non-conductive polymer containing nanometric inorganic fillers, as a replacement to the neat polymers offering better electrical and thermal properties. There is almost nowadays a consensus among the scientific community that such property enhancements can only be achieved when the nano-fillers present a reasonably good size dispersion and spatial distribution within the host polymer. However, due to nano-fillers' strong tendency to agglomerate and their generally poor compatibility with commonly-used polymers, to reach optimal dispersions has been found challenging in most cases. In order to improve the polymer/particles compatibility and therefore to avoid agglomeration and poor dispersion problems, polyhedral oligomeric silsesquioxanes (POSS) appears to be a filler of choice since they are by nature nanoscaled molecules bearing built-in functionalities which can be selected according to the chemical nature of the host polymer. This chapter summarizes the investigations that were reported so far on the electrical properties of epoxy/POSS, PE/POSS and PP/POSS systems. The general conclusion is that in the case of polyolefin/POSS composites, nanoscale dispersion was found to be hard to reach despite the selection alkyl-type POSS and the dielectric properties were not found to be strongly improved while in the case of epoxy/POSS systems, the selection of appropriate POSS compounds and a carefully chosen resin/additive/hardener ratio allow nanoscale dispersion accompanied with noticeable improvements of the dielectric properties.

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Section: X23 Dielectric Responsesupporting

confidence: 58%

Dielectric Properties of Epoxy/POSS and PE/POSS Systems

David

Andritsch

2018

Polymer/Poss Nanocomposites and Hybrid Materials

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“…LDPE/SEBS/5C shows no trend of frequency dispersion at any studied temperature; however, LDPE/SEBS‐MA/5C becomes slightly conductive only at 90°C with σ 0 lower than 10 −17 S/m and an exponent of 0.48. This can be attributed to the interaction of MA with functional groups on the surface of clay particles leading to improved dispersion and slightly higher conductivity .…”

Section: Resultsmentioning

confidence: 99%

“…Blends of thermoplastic elastomers with polyolefins have also been investigated recently. In particular, polystyrene‐b‐poly(ethylene‐ co ‐butylene)‐b‐polystyrene (SEBS) and polystyrene‐b‐poly(ethylene‐ co ‐butylene)‐b‐polystyrene‐grafted maleic anhydride (SEBS‐MA) thermoplastic elastomers have been shown to have enhanced electrical properties in the form nanocomposite when used solely as the base polymer or in conjunction with another polymer forming a blend . Because of the combination of the soft elastomer phase and a hard polystyrene phase, their spatial organization can modify the morphology of the blend and selectively accommodate the chosen nanofiller.…”

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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“…Among these materials, ZnO belongs to n ‐type semiconductor with wide band gap of 3.37 eV, large exciton binding energy of 60 meV at room temperature. Because of these characteristics, ZnO has wide applications in the fields of photonic devices, gas sensors, solar cells, ceramics, and transducers . When ZnO is doped with transition metals, it displays various applications including n ‐type nanolaser, ferromagnetic semiconducting nanomaterials, and so forth .…”

Section: Introductionmentioning

confidence: 99%

Structural, electrical, thermal, and gas sensing properties of new conductive blend nanocomposites based on polypyrrole/phenothiazine/silver‐doped zinc oxide

Ramesan

Greeshma

Parvathi

et al. 2019

Vinyl Additive Technology

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The main aim of this study is to investigate the effect of silver-doped zinc oxide (Ag-ZnO) loading on the structural, morphological, thermal and electrical properties, and gas sensing behavior of polypyrrole (PPy)/phenothiazine (PTZ)-blend nanocomposites. The composites are characterized by FTIR, XRD, SEM, TEM, DSC, TGA, and impedance studies. FTIR spectra exhibit the presence of Ag-ZnO in the PPy/PTZ blend. XRD analysis shows that the semicrystalline behavior of the polymer blend is greatly enhanced by the addition of Ag-doped ZnO particles. Uniform dispersion of nanoparticles in the polymer is obtained from SEM analysis. The TEM images confirm the presence of spherically shaped nanoparticles in PPy/PTZ blend with a size of 10-25 nm. The DSC measurement indicates that the glass transition temperature of PPy/PTZ blend was significantly improved in the presence of Ag-doped ZnO nanoparticles. The thermal decomposition temperature of nanocomposite obtained from TGA shows an increase with increase in the content of Ag-ZnO particles. The incorporation of Ag-doped ZnO nanoparticles to PPy/PTZ blend exhibit increase in the AC conductivity and dielectric properties of the nanocomposite, due to the pilling of charges at the extended interface of the composite system. The DC conductivity of the nanocomposite increases with the loading of nanoparticles. The ammonia gas sensing performance of PPy/PTZ/Ag-ZnO nanocomposite is analyzed, and the result shows that the fabricated blend composite can be used as a promising candidate for the easy access of gas molecules. Intensity (counts) FIG. 2. XRD patterns of Ag-doped ZnO, PPy/PTZ blend with different contents of Ag-doped ZnO. PPy-PTZ PPy-PTZ/ 5 wt % Ag-ZnO PPy-PTZ/ 7 wt % Ag-ZnO PPy-PTZ/ 10 wt % Ag-ZnO PPy-PTZ/ 15 wt % Ag-ZnO Tan Log frequency (Hz) FIG. 9. Dielectric loss tangent versus frequency plots for PPy/PTZ blend with Ag-doped ZnO nanoparticles. [Color figure can be viewed at wileyonlinelibrary.com]

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Polyethylene/thermoplastic elastomer/Zinc Oxide nanocomposites for high voltage insulation applications: Dielectric, mechanical and rheological behavior

Cited by 58 publications

References 57 publications

Dielectric Properties of Epoxy/POSS and PE/POSS Systems

Dielectric Properties of Epoxy/POSS and PE/POSS Systems

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

Structural, electrical, thermal, and gas sensing properties of new conductive blend nanocomposites based on polypyrrole/phenothiazine/silver‐doped zinc oxide

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