Water treeing, AC breakdown, and dielectric loss characteristics of EVA-OH as a function of conversion rate

Jung Woo Ko, Kwang Suck Suh, Seung Hyung Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Four kinds of ethylene-vinyl acetate-vinyl alcohol (EVA-OH) terpolymers containing different contents of hydroxyl groups were prepared using the transes-terification reaction between a ethylene-vinyl acetate (EVA) copolymer and alcohol. Structural and thermal analyses of the EVA-OH produced were performed with Fourier transform infrared spectroscopy and differential scanning calorimetry. Electrical properties such as water treeing, AC breakdown, and dielectric loss characteristics were investigated. It was found that both water tree length and the probability of water tree generation decreased as a function of hydroxyl group content. AC breakdown characteristicssuch as average breakdown strength and characteristic breakdown strength (breakdown probability = 63.2%) of EVA improved as a function of the conversion rate of EVA-OH from acetate to hydroxyl groups. Dielectric loss increased with hydroxyl group content in the low-frequency range. In contrast, it was observed that dielectric loss decreased with hydroxyl group content in the high-frequency range.

Original languageEnglish
Pages (from-to)420-424
Number of pages5
JournalJournal of Applied Polymer Science
Volume101
Issue number1
DOIs
Publication statusPublished - 2006 Jul 5

Fingerprint

Dielectric losses
Hydroxyl Radical
Ethylene
Alcohols
Water
Terpolymers
Fourier transform infrared spectroscopy
Differential scanning calorimetry
Acetates
Electric properties
Copolymers
ethylene
vinyl acetate

Keywords

  • Dielectric properties
  • Differential scanning calorimetry
  • FTIR
  • Graft copolymer
  • Melting point

ASJC Scopus subject areas

  • Polymers and Plastics

Cite this

Water treeing, AC breakdown, and dielectric loss characteristics of EVA-OH as a function of conversion rate. / Ko, Jung Woo; Suh, Kwang Suck; Lee, Seung Hyung.

In: Journal of Applied Polymer Science, Vol. 101, No. 1, 05.07.2006, p. 420-424.

Research output: Contribution to journalArticle

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