PASP-PEG block structure copolymer,comb shaped PASP-PEG block structure copolymer,aspartic acid and glycine,glutamic acid or propalanine copolymer are prepared.

还以对聚天冬氨酸的侧链进行改,引入烷烯烃、反应活高的氨酸酯、磺酸等功团,使其得到更广泛的应用。