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,引入烷基烯烃基、反高的氨基酸酯、磺酸基等功能基团,使其得到更广泛的用。