High-temperature creep resistant ternary blends based on polyethylene and polypropylene for thermoplastic power cable insulation
Artikel i vetenskaplig tidskrift, 2021

The impact of a small amount of polystyrene-b-poly(ethylene-co-butylene)-b-polystyrene (SEBS) on the thermomechanical and electrical properties of blends comprising low-density polyethylene (LDPE) and isotactic polypropylene (PP) is investigated. SEBS is found to assemble at the PP:LDPE interface as well as within isolated PP domains. The addition of 10 wt% SEBS significantly increases the storage modulus between the melting temperatures of the two polyolefins, 110 and 160°C, and results in improved resistance to creep during both tensile deformation as well as compression. Furthermore, the ternary blends display a very low direct-current (DC) conductivity as low as 3.4 × 10  S m at 70°C and 30 kV mm , which is considerably lower than values measured for neat LDPE. The here presented type of ternary blend shows potential as an insulation material for high-voltage direct current power cables.

high-voltage power cable insulation






Yingwei Ouyang

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Amir Masoud Pourrahimi

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Anja Lund

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Xiangdong Xu

Chalmers, Elektroteknik, Elkraftteknik

Thomas Gkourmpis

Borealis GmbH

Per Ola Hagstrand

Borealis GmbH

Christian Müller

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Journal of Polymer Science

26424150 (ISSN) 26424169 (eISSN)

Vol. 59 11 1084-1094


Annan materialteknik

Annan elektroteknik och elektronik

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