• Thermal Properties and Crystallization of Biodegradable Poly(L-lactic acid) and Poly(β-hydroxynonanoate) Blend
  • Park SH, Kim YB, Lee DS
  • 생분해성 Poly(L-lactic acid)/Poly(β-hydroxynonanoate)블렌드의 열적 성질 및 결정화거동
  • 박상혁, 김영백, 이두성
Abstract
A series of poly(L-latic acid)(PLLA)/poly(β-hydroxynonanoate)(PHN) blend were prepared to study the miscibility and the srystallization behaviors. The thermal behaviors and characterization of PLLA/PHN blends were studied using differential scanning calorimetry(DSC), XRD and polarizing optical microscopy(POM). The PLLA and PHN are partially miscible in amorphous region. The crystallinity of PLLA increased as the content of PHN increased, and Tg, Tc, and Tm of PLLA shift as the content of PHN increased. More over, the number of PLLA spherulite increased as the content of PHN increased in the POM experiment. Thus, PHN acted as a nucleating agent to PLLA.

Poly(L-lactic acid)(PLLA)/poly(β-hydroxynonanoate)(PHN) 블렌드의 혼화도와 결정화거동을 연구하기 위해 여러 중량 혼합비의 시료를 제조하였다. DSC, XRD 및 편광현미경을 이용하여 PLLA/PHN 블렌드의 열적 성질 및 특성을 연구하였다. PLLA와 PHN은 무정형 영역에서 부분적인 상용성을 가졌으며 PLLA의 결정화도는 PHN이 첨가됨으로 인하여 증가되었다. 그리고 PHN이 첨가됨으로써 PLLA의 Tg, Tc, Tm의 이동이 있었다. 편광현미경 분석을 통하여 PLLA 구정의 수는 PHN이 증가할수록 증가하는 것을 알 수 있었다. 이로부터 PHN은 PLLA에 대하여 기핵제의 역할이 있음이 관찰되었다.

Keywords: poly(L-lactic acid); poly(β-hydroxynonanoate); biodegradable polymer; nucleating agent

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This Article

  • 2000; 24(4): 477-487

    Published online Jul 25, 2000