materials can be related to the ring-opening reaction indicated in Fig. 1 and this result is a clear confirmation of the role played by ESBO as HCl scavenger Therefore, the only addition of ESBO to PVC with no further incorporation of other stabilizers was demon- strated to be successful in the increase in stability of the PVCeESBO materials, as indicated by Karmalm et al. [14,15]. In addition, these FTIR spectra showed the homogeneity of the mixture of the plasticizer and the PVC matrix with the consequent increase in ductile properties of these materials.