weight. The decomposition of PVA proceeded in three stages. Thefirst stage at 50–130◦C was due to moisture vaporization [52].The second stage, which begins at approximately 230◦C, mainlyinvolves dehydration accompanied by the formation of volatileproducts. In the third stage, polyene residues are further degradedat 449◦C to yield carbon and hydrocarbons. Thus, the PVA samplewas more thermally stable compared to chitosan, as indicated bythe appearance of a higher temperature peak for PVA. The compos-ite films showed the greatest weight loss in the range of 200–380◦C,which is believed to involve the disintegration of intermolecularbonds and the partial breaking of molecular structures. For thefirst stage, we observed a shift to a higher temperature, which canindicate interactions between the different polymer componentsin the composites. With the Ch/PVA/MMT composite (Table 3 andFig. 3), the weight loss behavior with temperature was peculiar.Above 150◦C, a three step degradation process was recognized.The major peak at ∼287◦C may correspond to the decomposition ofchitosan. The minor peak at ∼442◦C suggests that the degradationbehavior of pure PVA is retained in the composite. The new peakat ∼198◦C may indicate an increase in the heterogeneity of theternary composite in comparison to the two-component compos-ites. The overall thermal degradation temperature of the compositefilm decreases, indicating that PVA has a destabilizing effect on thechitosan composite.