한국섬유공학회지 (Textile Science and Engineering)

  • 제52권2호
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  • Pages.132-135
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  • 2015
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  • 1225-1089(pISSN)
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  • 2288-6419(eISSN)
한국섬유공학회 (The Korean Fiber Society)
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폴리(DL-락틱 엑시드) 첨가에 의한 폴리(L-락틱 엑시드)와 폴리(D-락틱 엑시드)의 스테레오 복합화 향상

Enhancement of Poly(L-lactic acid)/Poly(D-lactic acid) Stereocomplexation by Adding Poly(DL-lactic acid)

  • 김성혜 (금오공과대학교 화학소재융합학부 고분자공학전공) ;
  • 이상철 (금오공과대학교 화학소재융합학부 고분자공학전공)
  • Kim, Sung Hea (Department of Polymer Science and Engineering, Kumoh National Institute of Technology) ;
  • Lee, Sang Cheol (Department of Polymer Science and Engineering, Kumoh National Institute of Technology)
  • 투고 : 2015.02.21
  • 심사 : 2015.04.10
  • 발행 : 2015.04.30
⟨ 이전 논문 다음 논문 ⟩

초록

Ternary blends of poly(L-lactic acid)(PLLA)/poly(D-lactic acid)(PDLA)/poly(DL-lactic acid)(PDLLA), with the PLLA/PDLA blend ratio fixed at 50:50 (w/w), were prepared by the solution blending method, and their thermal properties were investigated by differential scanning calorimetry. Ternary blends containing less than 30% PDLLA exhibit double melting peaks at around $170^{\circ}C(T_{m1})$ and $220^{\circ}C (T_{m2})$, where $T_{m1}$ and $T_{m2}$ are the melting peaks of the homopolymer (PLLA and PDLA) and stereocomplex crystals, respectively. On the other hand, blends containing more than 50% PDLLA exhibit only one melting peak at about $220^{\circ}C$, which corresponds to the melting peak of the stereocomplex crystal. Further, the heat of fusion of the homopolymer crystals decreases with increasing PDLLA content in the blend, whereas that of the stereocomplex crystal increases with increasing PDLLA content. Therefore, it may be concluded that while the addition of PDLLA to the PLLA/PDLA (50:50) binary blend enhances the stereocomplexation of PLLA and PDLA, it also disturbs the crystallization of the homopolymers.

키워드

참고문헌

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