Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Effects of Drawing Conditions on the Properties of PBT/PTMGT-based Elastomeric Fibers

연신조건이 PBT/PTMGT계 탄성섬유 물성에 미치는 효과

  • Lee, Il Jae (Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University) ;
  • Seo, Moo Song (Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University) ;
  • Choi, Sung Wook (Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University) ;
  • Kim, Hyun Taek (Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University) ;
  • Baik, Doo Hyun (Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University)
  • 이일재 (충남대학교 유기소재.섬유시스템공학과) ;
  • 서무송 (충남대학교 유기소재.섬유시스템공학과) ;
  • 최성욱 (충남대학교 유기소재.섬유시스템공학과) ;
  • 김현택 (충남대학교 유기소재.섬유시스템공학과) ;
  • 백두현 (충남대학교 유기소재.섬유시스템공학과)
  • Received : 2019.11.19
  • Accepted : 2019.12.18
  • Published : 2019.12.28
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Abstract

Segmented block copolyetheresters based on poly(butylene terephthalate) (PBT) as a hard segment and poly(tetramethylene ether glycol) (PTMG) as a part of a soft segment were synthesized with varying hard segment content (HSC). The number average molecular weights of PTMG selected for use in this study were 650, 1000, 1800. The effects of the HSC and PTMG's molecular weight on the thermal properties of the copolyetheresters were examined, and five samples were selected for melt-spinning. From the results of the mechanical properties of the samples, we concluded that copolyetherester having 30 wt% of HSC with PTMGT 1800 is the best candidate among the copolymers tested for elastomeric fiber application. The fiber prepared from HSC 30 and PTMG 1800 was then drawn at various drawing temperatures and ratios. When the draw ratio was held constant, fibers drawn at higher temperature showed higher tenacity but lower elongation at break. This result is proposed to be due to the differences in the effectiveness of heat on the crystallinity, crystal size, and crystal orientation increments during the hot drawing process.

Keywords

References

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