Cargando…
Dynamic Thermomechanical Analysis on Water Tree Resistance of Crosslinked Polyethylene
The water tree resistance of crosslinked polyethylene (XLPE) initiated by ultraviolet (UV) irradiation technique is investigated through a water blade electrode method, and the effects of the mechanism of UV irradiation crosslinking on inhibiting water tree growth are revealed with dynamic thermomec...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6427811/ https://www.ncbi.nlm.nih.gov/pubmed/30841492 http://dx.doi.org/10.3390/ma12050746 |
_version_ | 1783405296360620032 |
---|---|
author | Sun, Kun Chen, Junqi Zhao, Hong Sun, Weifeng Chen, Yinsheng Luo, Zhongming |
author_facet | Sun, Kun Chen, Junqi Zhao, Hong Sun, Weifeng Chen, Yinsheng Luo, Zhongming |
author_sort | Sun, Kun |
collection | PubMed |
description | The water tree resistance of crosslinked polyethylene (XLPE) initiated by ultraviolet (UV) irradiation technique is investigated through a water blade electrode method, and the effects of the mechanism of UV irradiation crosslinking on inhibiting water tree growth are revealed with dynamic thermomechanical analysis (DMA). The accelerated water tree aging experiment shows that UV irradiation crosslinking inhibits the growth rate of water trees, and the water tree length and width is reduced with the increase of the crosslinking degree of XLPE. The DMA result demonstrates that the molecular activity of the amorphous phase in XLPE as represented by polyethylene β-relaxation is gradually intensified with the increase of the crosslinking reaction. Combined with the fatigue mechanism of water tree growth in semi-crystalline polymers, it is suggested that the UV irradiation crosslinking reaction can significantly improve the anti-water-tree performance of linear low-density polyethylene (LLDPE). The crosslinking bond in the amorphous phase of UV-photoinitiated crosslinking polyethylene can produce a large number of cross-connected polymer chains, by which the length of fiber is obviously increased, leading to an reduced force from the micro-water beads onto the crack tip and thus decreasing the rate of the material being destroyed by micro-water beads. |
format | Online Article Text |
id | pubmed-6427811 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-64278112019-04-10 Dynamic Thermomechanical Analysis on Water Tree Resistance of Crosslinked Polyethylene Sun, Kun Chen, Junqi Zhao, Hong Sun, Weifeng Chen, Yinsheng Luo, Zhongming Materials (Basel) Article The water tree resistance of crosslinked polyethylene (XLPE) initiated by ultraviolet (UV) irradiation technique is investigated through a water blade electrode method, and the effects of the mechanism of UV irradiation crosslinking on inhibiting water tree growth are revealed with dynamic thermomechanical analysis (DMA). The accelerated water tree aging experiment shows that UV irradiation crosslinking inhibits the growth rate of water trees, and the water tree length and width is reduced with the increase of the crosslinking degree of XLPE. The DMA result demonstrates that the molecular activity of the amorphous phase in XLPE as represented by polyethylene β-relaxation is gradually intensified with the increase of the crosslinking reaction. Combined with the fatigue mechanism of water tree growth in semi-crystalline polymers, it is suggested that the UV irradiation crosslinking reaction can significantly improve the anti-water-tree performance of linear low-density polyethylene (LLDPE). The crosslinking bond in the amorphous phase of UV-photoinitiated crosslinking polyethylene can produce a large number of cross-connected polymer chains, by which the length of fiber is obviously increased, leading to an reduced force from the micro-water beads onto the crack tip and thus decreasing the rate of the material being destroyed by micro-water beads. MDPI 2019-03-05 /pmc/articles/PMC6427811/ /pubmed/30841492 http://dx.doi.org/10.3390/ma12050746 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Sun, Kun Chen, Junqi Zhao, Hong Sun, Weifeng Chen, Yinsheng Luo, Zhongming Dynamic Thermomechanical Analysis on Water Tree Resistance of Crosslinked Polyethylene |
title | Dynamic Thermomechanical Analysis on Water Tree Resistance of Crosslinked Polyethylene |
title_full | Dynamic Thermomechanical Analysis on Water Tree Resistance of Crosslinked Polyethylene |
title_fullStr | Dynamic Thermomechanical Analysis on Water Tree Resistance of Crosslinked Polyethylene |
title_full_unstemmed | Dynamic Thermomechanical Analysis on Water Tree Resistance of Crosslinked Polyethylene |
title_short | Dynamic Thermomechanical Analysis on Water Tree Resistance of Crosslinked Polyethylene |
title_sort | dynamic thermomechanical analysis on water tree resistance of crosslinked polyethylene |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6427811/ https://www.ncbi.nlm.nih.gov/pubmed/30841492 http://dx.doi.org/10.3390/ma12050746 |
work_keys_str_mv | AT sunkun dynamicthermomechanicalanalysisonwatertreeresistanceofcrosslinkedpolyethylene AT chenjunqi dynamicthermomechanicalanalysisonwatertreeresistanceofcrosslinkedpolyethylene AT zhaohong dynamicthermomechanicalanalysisonwatertreeresistanceofcrosslinkedpolyethylene AT sunweifeng dynamicthermomechanicalanalysisonwatertreeresistanceofcrosslinkedpolyethylene AT chenyinsheng dynamicthermomechanicalanalysisonwatertreeresistanceofcrosslinkedpolyethylene AT luozhongming dynamicthermomechanicalanalysisonwatertreeresistanceofcrosslinkedpolyethylene |