As to PLA/MA-g-starch blend (Fig. 7b and e), it could be seen that the MA-g-starch was dispersed in PLA matrix in the form of irregular starch phase with the size range from 30 to 300 m, which was much larger than that of native starch, suggesting that the MA-g-starch was thermoplastic during the process of melt-blending with PLA.