Ml. Yuan et Xm. Deng, Synthesis and characterization of poly(ethylene glycol)-block-poly(amino acid) copolymer, EUR POLYM J, 37(9), 2001, pp. 1907-1912
Poly(ethylene glycol)(PEG) poly(amino acid) copolymer had been synthesized
by using amino-terminated PEG as a primary amine. The mechanism is that the
initiator amine undergoes a nucleophilic addition to the C-5 carbonyl grou
p of the N-carboxyanhydride (NCA). The copolymerization improve the solubil
ity of poly(amino acid) in organic solvents. Also, the hydrophilic/hydropho
bic and soft/hard of the poly(amino acid) homopolymer can be modulated by c
opolymerization of PEG with NCA. (C) 2001 Elsevier Science Ltd. All rights
reserved.