The disappearance of the anhydride peaks of PP-g-MA and the appearance of ester linkage in the FTIR spectra of
the blends indicated interaction between PP, PLA, and PP-g-MA [11]. Confirmation of the blend components
interaction in this study was observed by representing of the ester linkage at 1756-1755 cm-1 (Fig. 2(c-e)). The level
of attractive interaction can also be seen in an increase in the intensity of characteristic absorbance (A) bands [12],
which A is defined as the negative logarithm of the transmittance (T) or A is inverse relation with T [13]. Intensity
reduction of ester linkage transmittance band with increasing of PLA ratio in the blends corresponded to lower
content of ester linkage formation [14]. The absence of this peak could explain the occurrence of thermal chain
scission at C