Effect of Organotin on the Thermal Stability of Poly(Vinyl Chloride)
The thermal degradation behavior of PVC stabilized by the organotin were investigated by means of the thermogravimetric analysis and non-isothermal multiple scanning method. The results indicate that the lowest decomposition temperature is greater than 210°C in the conversion rate of 5%. The decomposition process occurred in three stages. The results calculated by Kissinger, Ozawa, Starink and Friedman methods show that the average apparent activation energy in first, second and third phase is 98.46kJ/mol, 111.24kJ/mol and 243.23kJ/mol respectively. In the initial reaction (α&lt;10%), the decomposition reaction is controlled by the first order (F1) mechanism, with a half-life of 4.92h at 180°C.