Dielectric performance of silica-filled nanocomposites based on miscible (PP/PP-HI) and immiscible (PP/EOC) polymer blends
| Autor: | Christelle Mazel, Anke Blume, Xiaozhen He, Rafal Anyszka, Minna Niittymaki, Wilma K. Dierkes, Amirhossein Mahtabani, Ilkka Rytoluoto, Mika Paajanen, Gabriele Perego, Eetta Saarimaki, Paolo Seri, Hadi Naderiallaf, Kari Lahti |
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| Přispěvatelé: | Tampere University, Electrical Engineering, Elastomer Technology and Engineering, He X., Seri P., Rytoluoto I., Anyszka R., Mahtabani A., Naderiallaf H., Niittymaki M., Saarimaki E., Mazel C., Perego G., Lahti K., Paajanen M., Dierkes W., Blume A. |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
UT-Gold-D General Computer Science HVDC cable insulation 02 engineering and technology PP/EOC 01 natural sciences Miscibility chemistry.chemical_compound charge trap distribution space charge accumulation 0103 physical sciences General Materials Science Thermal stability Composite material Fumed silica 010302 applied physics Polypropylene 213 Electronic automation and communications engineering electronics General Engineering PP/PP-HI Dynamic mechanical analysis nanosilica 021001 nanoscience & nanotechnology Space charge chemistry lcsh:Electrical engineering. Electronics. Nuclear engineering Polymer blend 0210 nano-technology Glass transition lcsh:TK1-9971 |
| Zdroj: | He, X, Seri, P, Rytöluoto, I, Anyszka, R, Mahtabani, A, Naderiallaf, H, Niittymäki, M, Saarimäki, E, Mazel, C, Perego, G, Lahti, K, Paajanen, M, Dierkes, W & Blume, A 2021, ' Dielectric performance of silica-filled nanocomposites based on miscible (PP/PP-HI) and immiscible (PP/EOC) polymer blends ', IEEE Access, vol. 9, 9328245, pp. 15847-15859 . https://doi.org/10.1109/ACCESS.2021.3052517 IEEE Access, 9:9328245, 15847-15859. IEEE IEEE Access IEEE Access, Vol 9, Pp 15847-15859 (2021) |
| ISSN: | 2169-3536 |
| DOI: | 10.1109/ACCESS.2021.3052517 |
| Popis: | This study compares different polymer-nanofiller blends concerning their suitability for application as insulating thermoplastic composites for High Voltage Direct Current (HVDC) cable application. Two polymer blends, PP/EOC (polypropylene/ethylene-octene copolymer) and PP/PP-HI (polypropylene/ propylene - ethylene copolymer) and their nanocomposites filled with 2 wt.% of fumed silica modified with 3-aminopropyltriethoxysilane were studied. Morphology, thermal stability, crystallization behavior dynamic relaxation, conductivity, charge trap distribution and space charge behavior were studied respectively. The results showed that the comprehensive performance of the PP/PP-HI composite is better than the one of the PP/EOC composite due to better polymer miscibility and flexibility, as well as lower charging current density and space charge accumulation. Nanosilica addition improves the thermal stability and dielectric properties of both polymer blends. The filler acts as nucleating agent increasing the crystallization temperature, but decreasing the degree of crystallinity. Dynamic mechanical analysis results revealed three polymer relaxation transitions: PP glass transition ( $\beta$ ), weak crystal reorientation ( $\alpha 1$ ) and melting ( $\alpha 2$ ). The nanosilica introduced deep traps in the polymer blends and suppressed space charge accumulation, but slightly increased the conductivity. A hypothesis for the correlation of charge trap distribution and polymer chain transition peaks is developed: In unfilled PP/EOC and PP/PP-HI matrices, charges are mostly located at the crystalline-amorphous interface, whereas in the filled PP/EOC/silica and PP/PP-HI /silica composites, charges are mostly located at the nanosilica-polymer interface. Overall, the PP/PP-HI (55/45) nanocomposite with 2 wt.% modified silica and 0.3 wt.% of antioxidants making it $a$ promising material for PP based HVDC cable insulation application with $a$ reduced space charge accumulation and good mechanical properties. |
| Databáze: | OpenAIRE |
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