Thermogravimetric analysis dehydration process

Mechanical and Thermal Properties For most of the alternative membranes to Nafion , the thermal stability is studied by thermogravimetric analysis (TGA). The different weight losses depending on temperature have been determined and identified in some cases by gas chromatographic analysis [49,114]. The first weight loss is related to the membrane dehydration between room temperature and 150 °C. The second one between 250 and 350 °C was identified as a desulfonation process (SO2 and SO losses) followed by polymer matrix degradation (CO and CO2 losses). From these experiments, sPI membranes were considered as thermally stable... 

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