Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Degradation Behaviors of Poly(l-lactide) using Model Systems

모델 시스템을 이용한 Poly(l-lactide)의 분해거동

  • Min Seong-Kee (Division of Chemical Engienering, Pukyong National University) ;
  • Moon Myong-Jun (Division of Chemical Engienering, Pukyong National University) ;
  • Lee Won-Ki (Division of Chemical Engienering, Pukyong National University)
  • 민성기 (부경대학교 응용화학공학부) ;
  • 문명준 (부경대학교 응용화학공학부) ;
  • 이원기 (부경대학교 응용화학공학부)
  • Published : 2006.02.01
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Abstract

The hydrolytic kinetics of biodegradable poly(l-lactide) (PLLA) have been studied by using two model systems, solution-grown single crystal (SC) and Langmuir monolayer techniques, for elucidating the mechanism for both alkaline and enzymatic degradations. The present study investigated the parameters such as degradation medium and time. The Langmuir mono layers of PLLA showed faster rates of hydrolysis when they were exposed to a basic subphase rather than they did when exposed to neutral subphase. Both degradation mediums had moderate concentrations to show a maximized activity, depending on their sizes. An alkaline degradation of SCs of PLLA showed the decrease of molecular weight of the remained crystals due to the erosion of chain-folding surface. However, the enzymatic degradation of SCs of PLLA occurred in the crystal edges thus the molecular weight of remained crystals was not changed. This behavior might be attributed to the size of enzymes which is much larger than that of alkaline ions; that is, the enzymes need larger contact area with monolayers to be activated.

Keywords

References

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