Solution-shearing of dielectric polymer with high thermal conductivity and electric insulation.

ABSTRACT: Polymer dielectrics, an insulating material ubiquitous in electrical power systems, must be ultralight, mechanically and dielectrically strong, and very thermally conductive. However, electric and thermal transport parameters are intercorrelated in a way that works against the occurrence of thermally conductive polymer electric insulators. Here, we describe how solution gel-shearing–strained polyethylene yields an electric insulating material with an outstanding in-plane thermal conductivity of 10.74 W m⁻¹ K⁻¹ and an average dielectric constant of 4.1. The dielectric constant and loss of such sheared polymer electric insulators are nearly independent of the frequency and a wide temperature range. The gel-shearing aligns ultrahigh–molecular weight polymer crystalline c

SUBMITTER: Li Z 

PROVIDER: S-EPMC8480926 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature