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韓國纖維工學會誌 = Textile science and engineering v.46 no.6=no.297, 2009년, pp.348 - 354   피인용횟수: 1

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  );
  • 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.


  • 주제어

    poly(L-lactic acid) (PLLA) .   spin draw yarn (SDY) .   annealing .   thermal property .   mechanical property .   birefringence.  

  • 참고문헌 (21)

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  • 이 논문을 인용한 문헌 (1)

    1. Kim, Min-Sup ; Kim, Young-Ho 2010. "Synchrotron Wide Angle X-ray Diffraction Analysis of Annealed PLLA Spin Draw Yarns" 韓國纖維工學會誌 = Textile science and engineering, 47(1): 22~28     

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