The OCC value indicates the epoxy groups present in the plasticizer. Higher OCC value in EPSO (3.58%) compared to EPO (3.23%) resembles stronger interaction (hydrogen bonding) between PLA and EPSO,which gives better tensile properties. Based on the result of elongation at break of plasticized PLAs, thePLA plasticized with 5 wt % EPO, 5 wt % EPSO showed the best results and were selected for further study and compared to pristine PLA.