Title

Characterization of polymer-filler interactions for a model nanocomposite based on silicone rubber

Document Type

Conference Proceeding

Publication Date

12-15-2016

Abstract

© 2016 IEEE. The electrical characteristics of polymeric insulating materials can be significantly modified by adding nanoparticles. The present study investigates the dielectric response and tries to identify the origin of the changes from the pure polymer to the nanocomposite. The effect of the nanoparticles on the material properties is investigated with the high-voltage arc resistance test. For this purpose nanocomposites consisting of polydimethylsiloxane and hydrophobic silica nanoparticles were produced by means of laboratory methods. Cross-linked and uncured samples of the polymer and various filler contents up to 10 wt% are analyzed. The homogenous distribution of the particles, which have a finite random distance, is confirmed by transmission electron microscopy. The local maximum of the arc resistance time is interpreted by the Interphase Volume Model. The dielectric spectroscopy revealed that the molecular weight and the cross-linking have no effect on the relaxation processes, while in the spectrum of the nanocomposite an additional relaxation is identified. These results suggest that an interphase forms.

Publication Source (Journal or Book title)

Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP

First Page

639

Last Page

642

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