Abstract:The pyrolysis characteristics and kinetics of fluoroether rubber in air and nitrogen flow were studied by thermogravimetric analysis at five different heating rates. The kinetic parameters of the pyrolysis process were calculated using the method of Flynn-Wall-Ozawa and the mechanism of reaction were investigated using the method of Popescu. The results suggested that as the heating rates increasing, the pyrolysis temperature of the sample is moved to be higher. There is only one peak in DTG curves. The sample is more stable under nitrogen flow and the pyrolysis process of it is promoted by oxygen. It was found that the average value of the activity energy in air is 172.5kJ/mol, while 260.9kJ/mol in nitrogen. The pyrolysis process in air are well described by the model of Three dimension (R3) between 340°C and 370°C, by the model of Ginstling-Brounshtein (G-B) between 370°C and 380°C, and by the model of Zhuravlev (Zh) between 380°C and 400°C. While the thermal decomposition process in nitrogen are well described by the model of Ginstling-Brounshtein (G-B) between 400°C and 430°C, by the model of Three dimension (R3) between 430°C and 460°C.
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