Abstract
Poly(ethylene terephthalate)/attapulgite nanocomposites were prepared by in situ polymerization. The nanoscaled AT rods were well dispersed in the PET matrix. The crystallization and melting behavior of PET in the composites were investigated by differential scanning calorimetry. The results show that the degree of crystallinity and the peak temperature of crystallization of PET/AT nanocomposites are higher than that of pure PET. The AT nanorods have a remarkable heterogeneous nucleation effect in PET. Several different analysis methods were used to describe the process of nonisothermal crystallization. The combination of the Avrami and Ozawa equations could describe the nonisothermal crystallization of the composites very well. By using a method proposed by Kissinger, activation energies have been evaluated to be 169, 197, 223, and 222 kJ/mol for nonisothermal crystallization of pure PET and PET/AT nanocomposites with AT loadings of 0.5, 1, and 2 wt.%, respectively.
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