Firstly, the PLA pellets and the CSR impact modifier,
ranging from 0 wt% to 10 wt%, were dry-blended
using a high speed mixer (Thermo, PRISM Pilot 3) at the
speed of 700 rpm for 30 s. Table 1 shows the blend
formulations of PLA and CSR particles. To toughen
PLA, each mixture was then melt-blended in