화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.11, No.6, 476-480, December, 2003
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Study on Hydrolytic Kinetics of Langmuir Monolayers of Biodegradable Polylactide Derivatives
Jin-Kook Lee, Jin-Ho Ryou1, Won-Ki Lee2, †, Chan-Young Park2, Sang-Bo Park2, and Seong-Kee Min2
  • Department of Polymer Science & Engineering, Pusan National University, San 30, Kumjunggu, Busan 609-735, Korea
  • 1Technical Research Laboratories, POSCO, Pohang 790-785, Korea
  • 2Division of Chemical Engineering, Pukyong National University, San 100, Namgu, Busan 608-739, Korea
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The rate of hydrolysis of Langmuir monolayer films of biodegradable polylactide (PLA) derivates was investigated at the air/water interface. The present study investigated such parameters as surface pressure, pH, and time. The hydrolysis of polyester monolayers depended strongly on the subphase pH, the concentration of active ions. Under the conditions studied here, polymer monolayers showed faster rates of hydrolysis when they were exposed to a basic subphase rather than they did when exposed to acidic or neutral subphases. By increasing the concentration of the degradation medium, the hydrolytic rate of dl-PLA monolayers was accelerated (accelerating effect). In addition, the basic hydrolysis of modified PLA with small amounts of hydrophilic (benzyloxycarbonyl) methyl morpholine-2,5-dione or glycolide was much faster than that of the PLA homopolymer.
Keywords:Langmuir;polylactide;hydrolysis;accelerating effect.
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