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Download fileThermally Induced Healing of Electrically Insulating Ethylene–Octene Copolymers
journal contribution
posted on 16.10.2019, 11:34 authored by Scott R. Zavada, Godfrey Sauti, Keith L. Gordon, Joseph G. Smith, Emilie J. SiochiWe report on electrical insulating
materials that not only have
sufficient mechanical toughness to survive use conditions but also
possess the ability to undergo thermally induced self-repair when
damaged. By controlling the cross-link density, a modified ethylene–octene
copolymer (EOC) is able to retain its self-healing abilities while
also being used at temperatures greater than the original, unmodified
polymer. Specifically, an EOC cross-linked with 0.25 wt % dicumyl
peroxide affords a material ability to recover 61% of its critical
fracture energya value similar to thermoplastic EOC. Furthermore,
as shown by dielectric spectroscopy, the cross-linked EOC retains
good electrically insulating properties.