The cold crystallization peak of pure PLA occurred in the range of about 100–125 C centered at 115 C with DHc = 26.6 - J/g, followed by melting at 150.5 C with DHm = 29.3 J/g. As determined by the differential values of the crystallization and melting
enthalpies, the crystallinity (XC) of pure PLA is only 2.9% after melt
blending, which indicates the material is almost amorphous