Mechanism of thermal stability of PVC

In the process, changing nature of thermal decomposition of PVC for the other small, primarily affects the color of the finished product, accession to the thermally stable agents can inhibit the initial coloring of the product. When off HCl concentration of 0.1,PVC color, we will begin to change. According to the different number of conjugated double bonds formed, PVC would be different colors (yellow, Orange, red, Brown, and black). If thermal decomposition process of PVC in the presence of oxygen, then there will be colloidal carbon and ester compounds, peroxides and carbonyl formation. But the product is in use for a long time, thermal degradation of PVC materials greatly influence the performance, adding delays the degradation of PVC heat stabilizer time or reduce the level of degradation of PVC.




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