Insulative ethylene-propylene copolymer-nanostructured polypropylene for high-voltage cable insulation applications
Worldwide, various efforts to replace crosslinked-polyethylene (XLPE) as an insulation layer in the cable industry, is becoming increasingly popular for improved recycling of polymer waste. Polypropylene (PP) has been proposed as a representative candidate because of its excellent thermomechanical a...
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Veröffentlicht in: | Polymer (Guilford) 2020-08, Vol.202, p.122674, Article 122674 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Worldwide, various efforts to replace crosslinked-polyethylene (XLPE) as an insulation layer in the cable industry, is becoming increasingly popular for improved recycling of polymer waste. Polypropylene (PP) has been proposed as a representative candidate because of its excellent thermomechanical and electrical performances. However, overcoming the mechanical limitations of intrinsic rigidity is required for cable applications. Herein, PP-based insulating materials were prepared via melt-blending with rubbery ethylene-1-octene copolymer (EOC), followed by mixing an ethylene-propylene random copolymer (rPP) as a surfactant for high-voltage power cable applications. Simple melt-blending of rPP formed a core-shell nanostructure composed of EOC/rPP and a fine dispersion of macron-sized EOC domains. The nanostructured PP ternary blends exhibited multiple advantages in terms of thermal stability, mechanical properties, dielectric performances, and long-term stability compared to the existing XLPE. This study provides a straightforward, rational design of environmental insulation materials for high voltage power cable applications.
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•Ternary nanostructured-PP blends were fabricated using EOC and rPP.•The size of EOC inclusions within PP was decreased with rPP content.•The PP blends exhibited increased mechanical and insulation performances with thermal stability. |
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ISSN: | 0032-3861 1873-2291 |
DOI: | 10.1016/j.polymer.2020.122674 |