Influence of Oxygen Diffusion on Thermal Ageing of Cross-Linked Polyethylene Cable Insulation

Autor:	Yuanyuan Zhang, Shihang Wang, Jianying Li, Kangning Wu, Shengtao Li, Zongke Hou
Rok vydání:	2020
Předmět:	Materials science oxygen diffusion chemistry.chemical_element Infrared spectroscopy XLPE 02 engineering and technology lcsh:Technology 01 natural sciences Article chemistry.chemical_compound 0103 physical sciences Ultimate tensile strength General Materials Science Composite material Fourier transform infrared spectroscopy lcsh:Microscopy lcsh:QC120-168.85 Tensile testing 010302 applied physics thermal ageing Cross-linked polyethylene lcsh:QH201-278.5 lcsh:T Polyethylene 021001 nanoscience & nanotechnology chemistry lcsh:TA1-2040 Ageing lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:TK1-9971 Carbon non-uniform
Zdroj:	Materials Materials, Vol 13, Iss 2056, p 2056 (2020) Volume 13 Issue 9
ISSN:	1996-1944
DOI:	10.3390/ma13092056
Popis:	Thermal ageing of cross-linked polyethylene (XLPE) cable insulation is an important issue threatening the safe operation of power cables. In this paper, thermal ageing of XLPE was carried out at 160 ° C in air for 240 h. The influence of oxygen diffusion on thermal ageing of XLPE was investigated by Ultraviolet&ndash visible spectrophotometer (UV&ndash Vis), tensile testing, and Fourier transformed infrared spectroscopy (FTIR). It was observed that the degradation degree not only depended on ageing time but also on sample positions. The thermally aged samples were more oxidized in the surface region, presented a darker color, more carbon atoms appeared in the conjugate cluster, had smaller elongation at break and tensile strength, and a larger carbonyl index. As ageing time increased, the non-uniform oxidation of the XLPE samples became more prominent. The degree of non-uniform oxidation caused by oxygen diffusion was quantitatively studied by first order oxidation kinetic. The calculated results demonstrated that carbonyl index measured by FTIR was more sensitive to non-uniform oxidation with a shape parameter in the range of 1&ndash 2. The result shown in this paper is helpful for interpreting and predicting the non-uniform ageing behavior of high voltage XLPE cables.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d6727c04671f708b04cdb5d45c8e049 https://doi.org/10.3390/ma13092056 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.