Dielectric breakdown analysis of composites consisting of epoxy resin and polyimide film

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F20%3A43959551" target="_blank" >RIV/49777513:23520/20:43959551 - isvavai.cz</a>

Alternative codes found

RIV/49777513:23220/20:43959551

Result on the web

<a href="https://ieeexplore.ieee.org/document/9214597" target="_blank" >https://ieeexplore.ieee.org/document/9214597</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/Diagnostika49114.2020.9214597" target="_blank" >10.1109/Diagnostika49114.2020.9214597</a>

Result language

angličtina

Original language name

Dielectric breakdown analysis of composites consisting of epoxy resin and polyimide film

Original language description

The breakdown phenomena and determination of dielectric strength is one of the essential topics in the field of insulating materials for high-voltage applications. In the case of basic thermosetting plastics, including epoxy resins, dielectric breakdown analysis has been performed many times, and the mechanism of conducting channel formation is already well known. However, the situation becomes more complicated if other material components are combined with the base polymer. The application of composites in electrical insulation systems is currently becoming more common. Of all available electrical insulating types of composites, the attention is paid to sandwich composite in this contribution. Specifically, a sandwich structure, which is an interconnection of a heat-resistant thermoplastic (polyimide film) and a conventional thermoset for high-voltage applications (epoxy resin layer), is analyzed. Tested structures were prepared as the composition of each one of the three different types of polyimide films and always the same conventional epoxy resin which is cured at elevated temperature after the amine curing agent addition. In the case of performed testing of sandwich composites, the conductive channel is formed rapidly through the two polymer layers, which are very different in chemical structure. In addition, an interface is formed between the material layers when these layers are interconnected during the epoxy resin curing process, and the effect of this interface must also be considered in the analysis of dielectric breakdown. This contribution is focused primarily on visual description of differences in a breakdown that occurs when different polyimide films without or even with a certain surface treatment are tested. The values of dielectric strength determined by the dynamic method for tested structures are also mentioned. It appears that the choice of a suitable polyimide film can be quite ignificant in the sandwich structure of the electrical insulation system in terms of dielectric strength.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20201 - Electrical and electronic engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of the 2020 International Conference on Diagnostics in Electrical Engineering (Diagnostika) : CDEE 2020

ISBN

978-1-72815-879-2

ISSN

2464-7071

e-ISSN

2464-708X

Number of pages

4

Pages from-to

198-201

Publisher name

University of West Bohemia in Pilsen

Place of publication

Pilsen

Event location

Pilsen, Czech Republic

Event date

Sep 1, 2020

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

001070410500043