Degradation of PVC and the function of stabilizers
Degradation of polyvinyl chloride (PVC) is mainly caused by the de-HCl reaction, in which the hydrogen (H) and chlorine (Cl) in PVC molecules are desorbed by heat during processing. The desorbed HCl accelerates this de-HCl reaction, resulting in a chain reaction called the Zipper reaction. As a result, a conjugated double bond (a single bond…