섬유

influence of surface property of carbon fiber on time and temperature dependences of ilss of cfrp

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 429
for carbon fiber reinforced plastics (cfrp) using six kinds of carbon fibers with different surface conditions, ilss was measured from 25 degrees c to 200 degrees c at various cross head speeds (chs), and the influence of surface structure of carbon fiber on the high temperature ilss of cfrp was investigated. ilss measured at high temperatures was higher for cfrp with surface treated fibers the logarithmic values of shift factor a/sub t/ by adopting time-temperature superposition principle were plotted against 1/t these arrhenius' plots showed differences among kinds of fibers and those with or without surface treatment. in every case, plots are aligned on a line that bends at a point. in the lower temperature range than the bending point on arrhenius' plot, the activation energy were from 140 to 230 kj/mol and it increased with the increment of the amount of cooh group obtained from c/sub 1s/ peak of x-ray photoelectron spectroscopy
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