Besides affecting the Tg, the increased molecular mobility favors
the re-crystallization of the material. This is observed for the PLABz
and the PLABz-NC blend as an exothermic re-crystallization peak
and an endothermic one corresponding to the melting (Fig. 4b). The
last peak is broad and appears to have an overlapped small second
endothermic peak, which is more notorious than in the thermogram
of the first heating scan, and especially so in the curve of the
blend (Fig. 4a).