Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
권호 표지

The Effect of High Tension Annealing on the Fine Structure and Physical Properties of Poly(ethylene 2,6-naphthalene dicarboxylate) Fibers

고장력 열처리한 Poly(ethylene 2,6-naphthalene dicarboxylate) 섬유의 미세구조와 물성

  • Kim Joon Hee (Department of Textile Engineering, Pusan National University) ;
  • Cho Hyun Hok (Department of Textile Engineering, Pusan National University)
  • 김준희 (부산대학교 섬유공학과) ;
  • 조현혹 (부산대학교 섬유공학과)
  • Published : 2005.02.01
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Abstract

PEN fibers spun at 4 km/min by high speed melt-spinning were treated by two methods, constant length annealing (CLA) and high tension annealing (HTA) at 130, 160, 190, and $220^{\circ}C$. The fine structure and physical properties of the PEN fibers were investigated with various techniques such as wide-angle X-ray diffraction, DSC thermo-grams, density, birefringence, tensile test etc. As the annealing temperatures is increased, a partial transition of the crystal structure, from $\beta$ form crystal to $\alpha$ form crystal appeared in the WAXD test in case of CLA treatment. But, in case of HTA treatment, the transition of the crystal form from $\beta$ form crystal to $\alpha$ form crystal appeared dominantly. As the annealing temperature and tension increases, the melting peaks become sharper in DSC thermograms. Density of PEN fibers from HTA treatment is lower than that from CLA treatment, but birefringence and initial modulus of the PEN fibers from HTA treatment are much higher than those from CLA treatment. But, shrinkage of the PEN fibers from HTA treatment is higher than that from CLA treatment.

Keywords

References

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