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

Mattias Andersson; Markus Jarvid; Anette Johansson; Stanislaw Gubanski; M. R. Foreman; Christian Muller; Mats R. Andersson

doi:10.1016/j.eurpolymj.2014.11.042

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

Mattias Andersson, Markus Jarvid, Anette Johansson, Stanislaw Gubanski, M. R. Foreman, Christian Muller, Mats R. Andersson

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	101-107
Number of pages	7
Journal	European Polymer Journal
Volume	64
DOIs	https://doi.org/10.1016/j.eurpolymj.2014.11.042
Publication status	Published - Mar 2015

Keywords

Dielectric strength
Electrical treeing
Gamma-radiation cross-linking
Hot set elongation
Polyethylene
Vinyl

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10.1016/j.eurpolymj.2014.11.042

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title = "Dielectric strength of γ-radiation cross-linked, high vinyl-content polyethylene",

abstract = "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.",

keywords = "Dielectric strength, Electrical treeing, Gamma-radiation cross-linking, Hot set elongation, Polyethylene, Vinyl",

author = "Mattias Andersson and Markus Jarvid and Anette Johansson and Stanislaw Gubanski and Foreman, {M. R.} and Christian Muller and Andersson, {Mats R.}",

year = "2015",

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doi = "10.1016/j.eurpolymj.2014.11.042",

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volume = "64",

pages = "101--107",

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AU - Andersson, Mattias

AU - Jarvid, Markus

AU - Johansson, Anette

AU - Gubanski, Stanislaw

AU - Foreman, M. R.

AU - Muller, Christian

AU - Andersson, Mats R.

PY - 2015/3

Y1 - 2015/3

N2 - 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.

AB - 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.

KW - Dielectric strength

KW - Electrical treeing

KW - Gamma-radiation cross-linking

KW - Hot set elongation

KW - Polyethylene

KW - Vinyl

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DO - 10.1016/j.eurpolymj.2014.11.042

M3 - Article

VL - 64

SP - 101

EP - 107

JO - European Polymer Journal

JF - European Polymer Journal

SN - 0014-3057

ER -

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

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Keywords

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