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.

polyethylene

high-voltage power cable insulation

thermoplastic

copolymer

polypropylene

Författare

Yingwei Ouyang

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

Amir Masoud Pourrahimi

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

Anja Lund

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Xiangdong Xu

Chalmers, Elektroteknik, Elkraftteknik, Elnät och komponenter

Thomas Gkourmpis

Borealis AB

Per Ola Hagstrand

Borealis AB

Christian Müller

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

Journal of Polymer Science

26424150 (ISSN) 26424169 (eISSN)

Vol. In Press

Ämneskategorier

Annan materialteknik

Annan elektroteknik och elektronik

Den kondenserade materiens fysik

DOI

10.1002/pol.20210147

Mer information

Senast uppdaterat

2021-05-25