Furan epoxy resin (FER) was firstly used to improve the compatibility between PLA and starch by reactive extrusion.The SEM results indicated that the compatibility between PLA and starch was significantly improved by the reactive compatibilization of FER.According to the static contact angle test

the surface chemical property of starch changed from hydrophilic to hydrophobic during the melting extrusion.The 1H-NMR

FTIR and XPS results demonstrated that the FER reacted with starch and PLA simultaneously during the melt blending

resulting in a better compatibility of PLA/starch composites.The DSC analysis indicated that the crystallinity of PLA matrix in PLA/FER/starch composites was increased from 4% to 29%.It was resulted from that FER could improve the interface property between PLA matrix and starch

then starch showed a better nucleation effect on PLA matrix.Moreover

the mechanical properties of PLA composites including flexible strength

flexible modulus and impact strength are all significantly improved

while maintaining the high strength and modulus of PLA

which was because of the rigid ring of FER.