Dielectric properties of epoxy/POSS and PE/POSS systems
Dielectric properties of epoxy/POSS and PE/POSS systems
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 nonconductive 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) appear 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.
David, Eric
d210f179-06d4-438e-b4ad-a43aa6ffcf7e
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
2019
David, Eric
d210f179-06d4-438e-b4ad-a43aa6ffcf7e
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
David, Eric and Andritsch, Thomas
(2019)
Dielectric properties of epoxy/POSS and PE/POSS systems.
In,
Kalia, Susheel and Pielichowski, Kryzysztof
(eds.)
Polymer/POSS Nanocomposites and Hybrid Materials: Preparation, Properties, Applications.
(Springer Series on Polymer and Composite Materials)
1 ed.
Springer Cham.
Record type:
Book Section
Abstract
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 nonconductive 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) appear 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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Submitted date: 2018
e-pub ahead of print date: 14 February 2019
Published date: 2019
Identifiers
Local EPrints ID: 425748
URI: http://eprints.soton.ac.uk/id/eprint/425748
PURE UUID: b251b725-cb4f-43f1-9bba-2e1827541d06
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Date deposited: 02 Nov 2018 17:30
Last modified: 16 Mar 2024 07:13
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Contributors
Author:
Eric David
Author:
Thomas Andritsch
Editor:
Susheel Kalia
Editor:
Kryzysztof Pielichowski
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