Dielectric Properties of Unsaturated Polyester Resin for Electric Safety

전기 안전에 관한 불포화폴리에스테르 수지의 유전특성

  • 이성일 ;
  • 권호영
  • Published : 1991.09.01


The dielectric properties that effect to electric safety for unsaturated Pelvester resin were studied over the temperature range of 30-40[$^{\circ}C$] and the frequency range of 110~3$\times$10$^{6}$ [Hz]. According to the results of the study, it has been observed that two kinds of dielectric losses in electric safety were existed by the molecular movement of C-H and OH group. When the ,adio of hardener was 1.5[%], the characteristics of specimens were excellent in view of the electrical materical. In the range of measuring frequency the dielectric constants and the dielectric losses were 3.5~5.5 and 10$^2$~10$^3$ respectly. The activation energy of loss spectrum in aspect of electric safety and the entropy appeared at the 30[$^{\circ}C$] were 33.4[Kacl/mole] and 54.9[cal/mole.deg] respectly.