From Fig. 1(a) and Table 1, it can be seen that the values of T0, Tc and Te of all investigated samples were around 88 C, 83 C and 78 C, respectively. This finding suggested independence of the crystallization behavior of the samples on nano-CaCO3. Moreover, the Xc of the samples varied
with the increasing nano-CaCO3 content, but this variation was irregular and not obvious.