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

还可以对聚天的侧链进行改性,引入烷基烯烃基、反应活性高的基、基等功能性基团,使其得到更广泛的应用。