Studies on biodegradable polymers in vitro degradation of poly(DL lactide)films / 中国康复理论与实践

@#In the paper,in vitro degradation of DL polylactic acid (PDLLA) film was studied.Regulation and tendency of degradation were showed by molecular weight regulator and monomer ration mass lossing.Degradation mechanism was discussed in light.It was thought that degradation of PDLLA in vitro was a simple hydrolysis reaction.The hydrolysis reaction was self catalytic reaction caused by terminal carboxyl group.