Abstract: | The instability of systems on PVC basis may be attributed to physical and chemical phenomena. The stability of the system is basically influenced by the oxidation stability of the plasticizers. The volatility loss in plasticizer is only partially due to physical processes. During ageing, oxidation and degradation processes take place to a minor or major degree, or exclusively, depending on the structure of the plasticizer. These processes may be affected in their order of magnitude by the stabilizers and fillers present in the system. |