Dielectric Performance of Silica-Filled Nanocomposites Based on Miscible (PP/PP-HI) and Immiscible (PP/EOC) Polymer Blends
نویسندگان
چکیده
This study compares different polymer-nanofiller blends concerning their suitability for application as insulating thermoplastic composites High Voltage Direct Current (HVDC) cable application. Two polymer blends, PP/EOC (polypropylene/ethylene-octene copolymer) and PP/PP-HI (polypropylene/ propylene - ethylene nanocomposites filled with 2 wt.% of fumed silica modified 3-aminopropyltriethoxysilane were studied. Morphology, thermal stability, crystallization behavior dynamic relaxation, conductivity, charge trap distribution space studied respectively. The results showed that the comprehensive performance composite is better than one due to miscibility flexibility, well lower charging current density accumulation. Nanosilica addition improves stability dielectric properties both blends. filler acts nucleating agent increasing temperature, but decreasing degree crystallinity. Dynamic mechanical analysis revealed three relaxation transitions: PP glass transition (β), weak crystal reorientation (α1) melting (α2). nanosilica introduced deep traps in suppressed accumulation, slightly increased conductivity. A hypothesis correlation chain peaks developed: In unfilled matrices, charges are mostly located at crystalline-amorphous interface, whereas PP/EOC/silica /silica composites, nanosilica-polymer interface. Overall, (55/45) nanocomposite 0.3 antioxidants making it a promising material based HVDC insulation reduced accumulation good properties.
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ژورنال
عنوان ژورنال: IEEE Access
سال: 2021
ISSN: ['2169-3536']
DOI: https://doi.org/10.1109/access.2021.3052517