Thermogravimetric curves of pure PVC film (Fig. 4a)
showed two degradation peaks at 287.7 C and 453.8 C,
corresponding to losses of 62.85% and 18.84% of the initial
mass, resulting in a total loss of 81.68%. The first plateau
relates to the dechlorination of PVC, with formation and
stoichiometric elimination of HCl, while the second is
attributed to polymer crosslinking containing C]C bonds.