Citric acid based epoxy was firstly used to modify the polylactic acid (PLA) /Starch composites by reactive extrusion. The static contact angle test and scanning electron microscope demonstrate that the citric acid based epoxy reacted with starch during the melt blending, resulting in the better compatibility of PLA/Starch composites. Moreover, the mechanical properties of PLA/starch composites including flexible strength and impact strength are all significantly improved by universal testing machine
