한국섬유공학회지 (Textile Science and Engineering)

  • 제46권6호
  • /
  • Pages.348-354
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  • 2009
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  • 1225-1089(pISSN)
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  • 2288-6419(eISSN)
한국섬유공학회 (The Korean Fiber Society)
권호 표지

열처리 조건이 PLLA SDY 섬유의 열적 특성 및 물성에 미치는 영향

Effect of Annealing on the Thermal and Mechanical Properties of PLLA Spin Draw Yarns

  • 김민섭 (숭실대학교 유기신소재.파이버공학과) ;
  • 김영호 (숭실대학교 유기신소재.파이버공학과)
  • Kim, Min-Sup (Department of Organic Materials and Fiber Engineering, Soongsil University) ;
  • Kim, Young-Ho (Department of Organic Materials and Fiber Engineering, Soongsil University)
  • 투고 : 2009.10.02
  • 심사 : 2009.12.07
  • 발행 : 2009.12.31
⟨ 이전 논문 다음 논문 ⟩

초록

Poly(L-lactic acid) (PLLA) filament fibers were prepared by one-step melt spinning process with spin drawing and the effects of the annealing at $100^{\circ}C$ and $120^{\circ}C$ on their thermal and mechanical properties were investigated by using a differential scanning calorimeter (DSC), dynamic mechanical analyzer (DMA), and universal testing machine (UTM). The glass transition temperature ($T_g$) of the PLLA spin draw yarn (SDY) fibers increased with increasing annealing time while the melting temperature ($T_m$) remained unaffected. The birefringence increased with increasing time at both $100^{\circ}C$ and $120^{\circ}C$, indicating the enhanced orientation of the polymers in the fiber. The tenacity of the fibers increased to almost double, while the elongation at break decreased to almost half by 5 minutes annealing at both $100^{\circ}C$ and $120^{\circ}C$. However, annealing time of more than 5 minutes did not affect the tenacity and elongation at break. The boiling water shrinkage (BWS) decreased continuously with increasing time, the increment was larger for the annealing at $120^{\circ}C$ than that at $100^{\circ}C$. A BWS of less than 3% was obtained by annealing at $120^{\circ}C$ for 30 minutes.

키워드

과제정보

연구 과제 주관 기관 : 한국과학재단

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