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Poly(DL-lactic acid-co-l-lysine) (PLAL) random copolymer was obtained by copolymerization of amino acid-N-carboxy anhydride with lactic acid anhydrosulphite in the presence of an initiator. The structures of the poly(DL-lactic acid-co- -cbz-l-lysine) and PLAL were characterized by IR, 1 H-NMR, 13 C-NMR and elemental analysis. Different initiators were used to initiate the ring-opening...
The synthesis of poly(DL-lactic acid)-co-poly(ethylene glycol)-co-poly(L-lysine) copolymer was investigated by the reaction of amino acid-N-carboxy anhydride with lactic acid anhydrosulphite and methoxypolyoxyethylene amine (MPEG-NH 2 ). The successful synthesis was obtained after adding dibutylmegnesium into the system. The product was proved to be copolymer. The solubility of the polymer...
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