A further
enhancement of impact strength occurred when higher rubber
content was added due to the fact that more acceptors of the dissipation
energy formed. As demonstrated in Fig. 7, the impact
strength of pure PLA is only 3.7 kJ/m, while that of 20 wt%
ENR20/PLA blend increases up to 6 folds, and that of 20 wt%
ENR50/PLA blend resulted in a 3 folds increase.