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

还可以对聚天冬氨酸的侧链进行改,烷烯烃、活高的氨酸酯、磺酸等功能团,使其得到更广泛的用。