Poly(lactide)s(PLA) is an attractive material to solve the problem of waste plastic accumulation in nature because of its biodegradability. The lactide exists in three stereoisomeric configurations: L-lactide, D-lactide, and meso-lactide. PLA stereocomplexes, formed by the mixing of two enantiomers, poly(L-lactide)(PLLA) and poly(D-lactide)(PDLA), have many favorable characteristics because the stereocomplex showed 50°C higher melting point than each enantiomeric polymer and the resistance toward degradation increased. In this study, we investigated the influence of the composition and the optical purity of each component on the formation of stereocomplexes. Also, the nanofibers of stereochemical PLA and their blends were prepared by electrospinning method. The properties of the obtained fibers were analyzed by differential scanning calorimetry and scanning electron microscopy. The results showed that a degree of stereocomplex was controlled by change of optical purity of each component. The enzymatic degradation of the fibers were strongly dependent on the stereocomplex.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 재료
  2.2. Stereochemical PLA의 합성
  2.3. Stereochemical PLA의 블렌드 제조
  2.4. 전기방사 섬유의 제조
  2.5. 섬유의 분해 특성
  2.6. 특성 분석
 3. 결과 및 고찰
  3.1. Stereochemical PLA의 특성
  3.2. L100/D100 블렌드 조성에 따른 특성
  3.3. 광학적 순도에 따른 stereochemical PLA 블렌드의특성
 4. 결 론
 참 고 문 헌

• 정의습(부경대학교 고분자공학과) | Ei-Sup Jang (Department of Polymer Engineering, Pukyong National University)
• 이원기(부경대학교 고분자공학과) | Won-Ki Lee (Department of Polymer Engineering, Pukyong National University) Corresponding author