Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Studies of Degradation Behavior of Stereochemical Poly(lactide) Blend Fibers Prepared by Electrospinning

전기방사에 의한 이성질 폴리락타이드 블렌드의 섬유제조와 분해거동에 관한 연구

  • Jang, Ei-Sup (Department of Polymer Engineering, Pukyong National University) ;
  • Lee, Won-Ki (Department of Polymer Engineering, Pukyong National University)
  • Received : 2013.12.09
  • Accepted : 2014.02.10
  • Published : 2014.03.31
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Abstract

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 $50^{\circ}C$ 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.

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References

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