The poly(lactic acid)/poly(butylene succinate) (PLA/PBS) blends with and without dicumyl peroxide (DCP) were prepared by melt mixing and the crystallization behaviors of the blends were investigated using a differential scanning calorimeter (DSC).The results showed that the crystallization ability of PLA was not improved when it was blended with PBS because of the higher molecular weight of PBS than that of PLA in this research

which was not in accord with results of some other researchers.However

the crystallization ability of PLA in the reactive blends (PLA/PBS/DCP) was promoted after the addition of different amount of DCP

because some crosslinked (or grafted) structures were generated in this matrix

and the crosslinked (or grafted) structures acted as nucleating points.It is found that when the content of DCP was from 0.1 phr to 0.3 phr

the crystallization was mostly caused by PBS

and this crystallization reduced with increasing the DCP content.When the content of DCP was above 0.3 phr

that is to say

PLA began to crystallize when the DCP content was 0.4 phr.The crystallization of PLA was enhanced with further increasing the content of DCP

while the crystallization of PBS was weakened in the same situation.In other words

the crystallization behavior of PLA and PBS in the PLA/PBS/DCP reactive blends was mostly depended on the DCP content.