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

Keywords

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

ASJC Scopus subject areas

  • Polymers and Plastics

Fingerprint Dive into the research topics of 'Water treeing, AC breakdown, and dielectric loss characteristics of EVA-OH as a function of conversion rate'. Together they form a unique fingerprint.

  • Cite this