fiber. However, Tg of PLA in the composite with the addition of PLAg-
MA shifts to the lower temperatures. It can be associated with
the addition of PLA-g-MA resulting in an increase in the chain
mobility of PLA molecule chain. The endothermic peak shape of
PLA are different from that of PLA with ramie fiber. This is due to
the change of the amorphous fractions in the polymer during the
cooling process caused by the ramie fiber. Wootthikanokkhan
et al. [34] also observed similar thermal behavior of the composites
and shape change in Tg. From Fig. 5, the neat PLA and ramie/PLA
composite can show the melting peak at 165.7 C and 166.8 C
respectively. After the addition of ramie and PLA-g-MA, Xc of
ramie/PLA composites decreases gradually which can be explained
that the decrease of the regularity of the PLA molecular chain with
addition of ramie and PLA-g-MA.