It was found that samples with a feeding ratio of lactide
to chitosan of >10:1 have a melting transition in their
DSC curves. The melting enthalpies and peak temperatures
of each of them are also shown in Table 1. The
DSCs are the curves illustrated in Figure 3. The melting
points of the copolymers decrease from 150.65 to
139.95 C with the content of polylactide increasing. The
enthalpies of the copolymers rise slowly from 2.3359 to
3.3055 cal/g. Namely the melting point (T ) gradually