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 language | English |
|---|---|
| Pages (from-to) | 420-424 |
| Number of pages | 5 |
| Journal | Journal of Applied Polymer Science |
| Volume | 101 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2006 Jul 5 |
Keywords
- Dielectric properties
- Differential scanning calorimetry
- FTIR
- Graft copolymer
- Melting point
ASJC Scopus subject areas
- Chemistry(all)
- Surfaces, Coatings and Films
- Polymers and Plastics
- Materials Chemistry