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    Alkaline hydrolysis of modified poly(L-lactide) monolayers

    Year: 2004

    Journal: -, 20111221

    Authors: Jin-Kook Lee, Chang-Sik Ha, Won-Ki Lee

    Organizations: a Department of Polymer Science and Engineering, Pusan National University, Pusan 609-735, South Korea b Division of Chemical Engineering, Pukyong National University, Yongdang-dong, Namgu, Pusan 608-739, South Korea

    In this work, hydrolysis of biodegradable poly(L-lactide) (L-PLA) and copolymers of L-lactide (L-LA) and (benzyloxycarbonyl) methyl mophorline-2,5-dione (BMD) was investigated at the air/water interface. In order to improve the hydrophilicity of L-PLA, small amounts of BMD were copolymerized with L-LA. NaOH was used to adjust the pH of the subphase water. Under the conditions studied here, polymer monolayers showed much faster hydrolysis as either a subphase pH or the concentration of BMD in the copolymer is increased. This result was explained by increasing numbers of base attack sites per unit area and increasing hydrophilicity.