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Effects of positive and negative stretching on the structure and properties of polyacrylonitrile fibers in the pre-oxidation process

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2011, 12(2), pp.107-111
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General

Liang Wang 1 Wei Lu 1 Li Zhang 1 Liwei Xue 1 RYU SEUNG KON 2 Ri-guang Jin 1

1Beijing University of Chemical Technology
2충남대학교

Candidate

ABSTRACT

Polyacrylonitrile (PAN) fibers were pre-oxidized in a temperature range of 180-275°C. The effects of positive and negative stretching on the structure and morphology of PAN fiber in the pre-oxidation process were studied by FTIR spectroscopy, XRD, and SEM. Mechanical property changes were also investigated. No changes in the movement and intensity of functional groups of PAN fibers were caused by positive stretching of up to 10% and negative stretching down to -8%. The crystal structure can be affected by the positive stretching and negative stretching. The maximum strength is 479.81 MPa when the stretching is positive,and the maximum strength is 420.55 MPa when the stretching is negative.

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