Abstract
AbstractRing‐opening copolymerization (ROCP) of L‐lactide (L‐LA) and (3S)‐benzyloxymethyl‐(6S)‐methyl‐morpholine‐2,5‐dione [(3S, 6S)‐BMMD] initiated by creatinine acetate, a biogenic organic compound, was performed in the bulk at 130 °C. The copolymerization was well controlled as evidenced by that both the measured values of number‐average molecular weight (Mn,NMR(OH) and Mn,NMR(COOH)) and serine molar fraction (FBz.ser) of synthesized copolymers were close to the corresponding theoretical values; and that the higher isotacticity of synthesized copolymers (85–86%) and lower racemization degree of the ROCP. After removing O‐benzyls of the copolymers with Et3SiH/Et3N/CH2Cl2 under catalysis of PdCl2, functional biodegradable copolymers of L‐lactic acid (L‐Lac) and L‐Ser with designed molar fraction of serine (Fser 1.35%, 3.57%, 5.41%), narrow molecular weight distribution (polydispersity index 1.10–1.36), and improved hydrophilicity (θstat 82.3–89.6°) were finally obtained. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012
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