Oyama [20] studied the effects of annealing of PLA/EGMA blends on mechanical properties and concluded that
the crystallization of the PLA matrix played a significant role in toughening.
In order to clarify whether PLA crystallization had any influence on the toughening in our blend system, the crystallization and melting behaviors of the PLA components in blends were examined.
Fig. 4 shows the DSC thermograms of PLA/NR blends. Neat PLA thermogram shows cold crystallization of PLA and subsequent melting of PLA crystals.