PLA/1 wt % EPO and PLA/1 wt % EPSO show increments of approximately 5% and 11%, respectively
as shown in Figure 3a, compared to neat PLA. The tensile strength of PLA decreases with the addition
of plasticizers above 1 wt %. The drop in tensile strength may be caused by the formation of
plasticizer-plasticizer interaction which dominates at higher EPO or EPSO contents