Title:	Dielectric and thermal properties of self-healing carboxylated nitrile rubber ionically cross-linked with zinc oxide
Authors:	Nikolić, Valentino Kadlec, Petr Polanský, Radek Utrera-Barrios, Saul Santana, Marianella Hernandez
Citation:	NIKOLIĆ, V. KADLEC, P. POLANSKÝ, R. UTRERA-BARRIOS, S. SANTANA, MH. Dielectric and thermal properties of self-healing carboxylated nitrile rubber ionically cross-linked with zinc oxide. In 2022 IEEE Electrical Insulation Conference (EIC 2022) : /proceedings/. Piscaway: IEEE, 2022. s. 124-127. ISBN: 978-1-66548-023-9
Issue Date:	2022
Publisher:	IEEE
Document type:	konferenční příspěvek ConferenceObject
URI:	2-s2.0-85136336990 http://hdl.handle.net/11025/49670
ISBN:	978-1-66548-023-9
Keywords in different language:	carboxylated nitrile rubber;self-healing material;dielectric properties;characterization;thermal analyses
Abstract in different language:	Dielectric and thermal properties of carboxylated nitrile rubber (XNBR), ionically cross-linked with zinc oxide (ZnO), were characterized to verify its suitability for a high-voltage insulation application. Moreover, the material self-healing (SH) capabilities were assessed after dielectric strength measurement by following IEC 60243. The initial thermal characterization via simultaneous thermal analysis (STA) showed that the material is thermo-oxidatively stable to around 330 °C when the weight loss reaches about 3 %. The dielectric properties of the material as a function of temperature and frequency were analyzed using broadband dielectric spectroscopy (BDS). BDS revealed that dielectric constant and loss factor values reach the generally acceptable level for an insulation material at the industrial frequency (50 Hz) and temperatures below -20 °C. At higher frequencies (specifically at 1 MHz) and temperatures of 60 °C, a significant increase of the values are evidenced, which is affected by polarization processes. Furthermore, it was found that the tested material achieves mean values of volume and surface resistivity of 5.12E+08 Ω•cm and 2.01E+10 Ω, respectively, and a relatively low value of dielectric strength (12 kV/mm). A detailed analysis of the dynamic electrical breakdown process showed that the tested material could partly heal its chain structure, especially in the early stages of breakdown's channel formation.
Rights:	Plný text je přístupný v rámci univerzity přihlášeným uživatelům. © IEEE
Appears in Collections:	Konferenční příspěvky / Conference papers (RICE) Konferenční příspěvky / Conference Papers (KET) OBD

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