Determination of the effects of accelerated ageing on the dielectric properties of LLDPE and LLDPE/HNT composites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23220%2F18%3A43952930" target="_blank" >RIV/49777513:23220/18:43952930 - isvavai.cz</a>

Výsledek na webu

<a href="https://ieeexplore.ieee.org/document/8544903" target="_blank" >https://ieeexplore.ieee.org/document/8544903</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/CEIDP.2018.8544903" target="_blank" >10.1109/CEIDP.2018.8544903</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Determination of the effects of accelerated ageing on the dielectric properties of LLDPE and LLDPE/HNT composites

Popis výsledku v původním jazyce

Composites based on a linear low-density polyethylene (LLDPE) and containing clay filler halloysite nanotubes (HNT) are perspective due to advantageous fire retardancy. This paper is focused on an impact assessment of an accelerated aging on dielectric properties of these composites (LLDPE/HNT), more specifically, accelerated aging by intensive ultraviolet (UV) radiation is taken into account. Evaluation of this type of aging is important in every practical situation when electrically insulating layers are exposed to sunlight. Composites were prepared with three different weight percentage of clay filler and pure LLDPE is used as the reference material. Samples were exposed to UV radiation for 50 h, 100 h, and 150 h. Emphasis is placed primarily on the characterization of changes in dielectric strength in a harmonic electric field and volume resistivity of tested materials. Furthermore, tested materials were also analyzed by broadband dielectric spectroscopy to describe an influence of the exposure to UV radiation on the frequency and temperature dependent relative permittivity. Detection of a minimal deterioration and, in some cases, even a slight improvement of selected dielectric parameters of LLDPE/HNT caused by UV radiation, is very positive. Results obtained by broadband dielectric spectroscopy prove changes of polarization processes in tested composites which occurred as an effect of UV irradiation.

Název v anglickém jazyce

Determination of the effects of accelerated ageing on the dielectric properties of LLDPE and LLDPE/HNT composites

Popis výsledku anglicky

Composites based on a linear low-density polyethylene (LLDPE) and containing clay filler halloysite nanotubes (HNT) are perspective due to advantageous fire retardancy. This paper is focused on an impact assessment of an accelerated aging on dielectric properties of these composites (LLDPE/HNT), more specifically, accelerated aging by intensive ultraviolet (UV) radiation is taken into account. Evaluation of this type of aging is important in every practical situation when electrically insulating layers are exposed to sunlight. Composites were prepared with three different weight percentage of clay filler and pure LLDPE is used as the reference material. Samples were exposed to UV radiation for 50 h, 100 h, and 150 h. Emphasis is placed primarily on the characterization of changes in dielectric strength in a harmonic electric field and volume resistivity of tested materials. Furthermore, tested materials were also analyzed by broadband dielectric spectroscopy to describe an influence of the exposure to UV radiation on the frequency and temperature dependent relative permittivity. Detection of a minimal deterioration and, in some cases, even a slight improvement of selected dielectric parameters of LLDPE/HNT caused by UV radiation, is very positive. Results obtained by broadband dielectric spectroscopy prove changes of polarization processes in tested composites which occurred as an effect of UV irradiation.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

Annual Report : Conference on Electrical Insulation and Dielectric Phenomena (CEIDP 2018)

ISBN

978-1-5386-6192-5

ISSN

0084-9162

e-ISSN

2576-2397

Počet stran výsledku

4

Strana od-do

346-349

Název nakladatele

IEEE

Místo vydání

Piscataway

Místo konání akce

Cancun, Mexiko

Datum konání akce

21. 10. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000516828400085