Polyethylene/polyhedral oligomeric silsesquioxanes composites: Electrical insulation for high voltage power cables

Xylene solution blending was tested as a method for producing low-density polyethylene (LDPE)-based nanodielectrics containing 1 wt% and 5 wt% polyhedral oligomeric silsesquioxanes (POS) of different types - octamethyl POS, octaisobutyl POS, and isooctyl POS. The chemical composition, the morphology...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2017-04, Vol.24 (2), p.798-807
Main Authors: Meng Guo, Frechette, Michel, David, Eric, Demarquette, Nicole R., Daigle, Jean-Christophe
Format: Article
Language:English
Subjects:
Broadband
Chemical composition
Dielectric breakdown
Dielectric properties
Differential scanning calorimetry
Electric cables
Electric corona
Electrical insulation
Electrical resistivity
Fourier transforms
Heat conductivity
Heat transfer
Infrared analysis
Insulation
isooctyl
Low density polyethylenes
Morphology
octaisobutyl
octamethyl
Polyethylene
Polyhedral oligomeric silsesquioxane
polyhedral oligomeric silsesquioxanes
Polymer matrix composites
POSS
Power cables
Production methods
Solution blending
Spectrum analysis
Thermal conductivity
thermal properties
Thermodynamic properties
Thermogravimetric analysis
Xylene
xylene solution blending
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Summary:Xylene solution blending was tested as a method for producing low-density polyethylene (LDPE)-based nanodielectrics containing 1 wt% and 5 wt% polyhedral oligomeric silsesquioxanes (POS) of different types - octamethyl POS, octaisobutyl POS, and isooctyl POS. The chemical composition, the morphology, the thermal properties and the dielectric properties of LDPE and its composites were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, differential scanning calorimetry, thermal conductivity measurements, broadband dielectric spectroscopy, progressive-stress breakdown tests, and surface partial discharge tests. The results showed that although xylene solution blending was an effective method for producing LDPE/POS dielectric composites, it appeared ineffective in dispersing POS at the nanoscale. Furthermore, some of the composites presented an improved thermal conductivity, a maintained breakdown strength and an enhanced resistance to corona discharges.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2017.006144