Dielectric strength of γ-radiation cross-linked, high vinyl-content polyethylene
Journal article, 2015

We explore γ-radiation cross-linking of high vinyl-content low-density polyethylene (LDPE) and its potential use as a high-voltage insulation material. Of the three investigated resins containing 1, 0.5 and 0.17 vinyl groups per 1000 carbons, respectively, only the highest vinyl-content material featured a sufficiently high gel content of more than 70% and hot-set elongation below 175%, when cross-linked with a γ-radiation dose of at least 68 kGy. Differential scanning calorimetry (DSC) and small-angle X-ray scattering (SAXS) reveal that neither the crystallinity nor the lamellar thickness of the highest vinyl-content LDPE are negatively affected by γ-radiation cross-linking. As a result, we find that the dielectric strength, as characterized by electrical tree initiation experiments, can be maintained upon γ-radiation cross-linking.

Hot set

Gamma-radiation cross-linking

Electrical treeing

Polyethylene

Vinyl

Dielectric strength

Author

Mattias Andersson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Markus Jarvid

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Anette Johansson

Chalmers, Materials and Manufacturing Technology, High Voltage Engineering

Stanislaw Gubanski

Chalmers, Materials and Manufacturing Technology, High Voltage Engineering

Mark Foreman

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Nuclear Chemistry

Christian Müller

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Mats Andersson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

European Polymer Journal

0014-3057 (ISSN)

Vol. 64 101-107

Subject Categories

Polymer Chemistry

Areas of Advance

Energy

Materials Science

DOI

10.1016/j.eurpolymj.2014.11.042

More information

Latest update

1/30/2018