Dielectric responses of polyurethane/zinc oxide blends for dry-type cast cold-curing resin transformers

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23220%2F21%3A43960941" target="_blank" >RIV/49777513:23220/21:43960941 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/2073-4360/13/3/375" target="_blank" >https://www.mdpi.com/2073-4360/13/3/375</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/polym13030375" target="_blank" >10.3390/polym13030375</a>

Result language

angličtina

Original language name

Dielectric responses of polyurethane/zinc oxide blends for dry-type cast cold-curing resin transformers

Original language description

The influence of different concentrations (0.5, 1.0, and 2.0 wt.%) of Zinc Oxide (ZnO) filleron the dielectric properties of the cold-curing polyurethane (PU) resin is presented in this study. Forthis purpose, the direct DC conductivity and the broadband dielectric spectroscopy measurementswere used to describe the changes in dielectric responses of PU/ZnO nanocomposites over thefrequency and temperature range, respectively. It can be stated that, the 1.0 wt.% nanoparticlesand lower caused a decrease in the real relative permittivity compared to the pure PU resin, whilethe higher concentration of nanoparticles for frequencies above 1 Hz had the opposite effect. Thepresence of nanoparticles in the polyurethane resin affected the segmental dynamics of the polymerchain and changed a charge distribution in the given system. These changes caused a shift of localrelaxation peaks in the spectra of imaginary permittivity and dissipation factor of nanocomposites.It is suggested that the temperature-dependent transition of the electric properties in the nano-composite is closely associated with theα-relaxation and intermediate dipolar effects (IDE).

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20201 - Electrical and electronic engineering

Project

<a href="/en/project/EF18_069%2F0009855" target="_blank" >EF18_069/0009855: Electrical Engineering Technologies with High-Level of Embedded Intelligence</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

Polymers

ISSN

2073-4360

e-ISSN

—

Volume of the periodical

13

Issue of the periodical within the volume

3

Country of publishing house

CH - SWITZERLAND

Number of pages

12

Pages from-to

1-12

UT code for WoS article

000615425900001

EID of the result in the Scopus database

2-s2.0-85100351361