Effect of Acetylated SEBS/PP for Potential HVDC Cable Insulation
Blending thermoplastic elastomers into polypropylene (PP) can make it have great potential for high-voltage direct current (HVDC) cable insulation by improving its toughness. However, when a large amount of thermoplastic elastomer is blended, the electrical strength of PP will be decreased consequen...
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MDPI AG
2021-03-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/7/1596 |
| _version_ | 1797540071312719872 |
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| author | Peng Zhang Yongqi Zhang Xuan Wang Jiaming Yang Wenbin Han |
| author_facet | Peng Zhang Yongqi Zhang Xuan Wang Jiaming Yang Wenbin Han |
| author_sort | Peng Zhang |
| collection | DOAJ |
| description | Blending thermoplastic elastomers into polypropylene (PP) can make it have great potential for high-voltage direct current (HVDC) cable insulation by improving its toughness. However, when a large amount of thermoplastic elastomer is blended, the electrical strength of PP will be decreased consequently, which cannot meet the electrical requirements of HVDC cables. To solve this problem, in this paper, the inherent structure of thermoplastic elastomer SEBS was used to construct acetophenone structural units on its benzene ring through Friedel–Crafts acylation, making it a voltage stabilizer that can enhance the electrical strength of the polymer. The DC electrical insulation properties and mechanical properties of acetylated SEBS (Ac-SEBS)/PP were investigated in this paper. The results showed that by doping 30% Ac-SEBS into PP, the acetophenone structural unit on Ac-SEBS remarkably increased the DC breakdown field strength of SEBS/PP by absorbing high-energy electrons. When the degree of acetylation reached 4.6%, the DC breakdown field strength of Ac-SEBS/ PP increased by 22.4% and was a little higher than that of PP. Ac-SEBS, with high electron affinity, is also able to reduce carrier mobility through electron capture, resulting in lower conductivity currents in SEBS/PP and suppressing space charge accumulation to a certain extent, which enhances the insulation properties. Besides, the highly flexible Ac-SEBS can maintain the toughening effect of SEBS, resulting in a remarkable increase in the tensile strength and elongation at the break of PP. Therefore, Ac-SEBS/PP blends possess excellent insulation properties and mechanical properties simultaneously, which are promising as insulation materials for HVDC cables. |
| first_indexed | 2024-03-10T12:55:52Z |
| format | Article |
| id | doaj.art-308add515c0841649a99bdd1266b7d59 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T12:55:52Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-308add515c0841649a99bdd1266b7d592023-11-21T11:55:54ZengMDPI AGMaterials1996-19442021-03-01147159610.3390/ma14071596Effect of Acetylated SEBS/PP for Potential HVDC Cable InsulationPeng Zhang0Yongqi Zhang1Xuan Wang2Jiaming Yang3Wenbin Han4Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, ChinaKey Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, ChinaKey Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, ChinaKey Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, ChinaKey Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, ChinaBlending thermoplastic elastomers into polypropylene (PP) can make it have great potential for high-voltage direct current (HVDC) cable insulation by improving its toughness. However, when a large amount of thermoplastic elastomer is blended, the electrical strength of PP will be decreased consequently, which cannot meet the electrical requirements of HVDC cables. To solve this problem, in this paper, the inherent structure of thermoplastic elastomer SEBS was used to construct acetophenone structural units on its benzene ring through Friedel–Crafts acylation, making it a voltage stabilizer that can enhance the electrical strength of the polymer. The DC electrical insulation properties and mechanical properties of acetylated SEBS (Ac-SEBS)/PP were investigated in this paper. The results showed that by doping 30% Ac-SEBS into PP, the acetophenone structural unit on Ac-SEBS remarkably increased the DC breakdown field strength of SEBS/PP by absorbing high-energy electrons. When the degree of acetylation reached 4.6%, the DC breakdown field strength of Ac-SEBS/ PP increased by 22.4% and was a little higher than that of PP. Ac-SEBS, with high electron affinity, is also able to reduce carrier mobility through electron capture, resulting in lower conductivity currents in SEBS/PP and suppressing space charge accumulation to a certain extent, which enhances the insulation properties. Besides, the highly flexible Ac-SEBS can maintain the toughening effect of SEBS, resulting in a remarkable increase in the tensile strength and elongation at the break of PP. Therefore, Ac-SEBS/PP blends possess excellent insulation properties and mechanical properties simultaneously, which are promising as insulation materials for HVDC cables.https://www.mdpi.com/1996-1944/14/7/1596polypropylenevoltage stabilizerHVDC cablethermoplastic elastomer |
| spellingShingle | Peng Zhang Yongqi Zhang Xuan Wang Jiaming Yang Wenbin Han Effect of Acetylated SEBS/PP for Potential HVDC Cable Insulation Materials polypropylene voltage stabilizer HVDC cable thermoplastic elastomer |
| title | Effect of Acetylated SEBS/PP for Potential HVDC Cable Insulation |
| title_full | Effect of Acetylated SEBS/PP for Potential HVDC Cable Insulation |
| title_fullStr | Effect of Acetylated SEBS/PP for Potential HVDC Cable Insulation |
| title_full_unstemmed | Effect of Acetylated SEBS/PP for Potential HVDC Cable Insulation |
| title_short | Effect of Acetylated SEBS/PP for Potential HVDC Cable Insulation |
| title_sort | effect of acetylated sebs pp for potential hvdc cable insulation |
| topic | polypropylene voltage stabilizer HVDC cable thermoplastic elastomer |
| url | https://www.mdpi.com/1996-1944/14/7/1596 |
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