Abstract
Non-isothermal degradation process of different mass ratios of epoxy/ammonium perchlorate (EP/AP) composites was studied by thermogravimetric (TG) analysis and differential scanning calorimetry. TG data were treated with AKTS-Thermokinetics software, Flynn–Wall–Ozawa and Friedman’s isoconversional methods for measuring the variation of apparent activation energy (E a) with degree of conversion (α). It was found that thermal degradation process of EP/AP composites is complex, and theirs thermal degradation temperatures are lower than that for epoxy and ammonium perchlorate (AP). The obtained results showed that the degradation activation energy of the EP/AP composites is equal or higher than that for epoxy at the beginning of the degradation. The most interesting finding was that epoxy resin can shift high-temperature decomposition peak of AP to a lower temperature. Self-accelerating decomposition temperature (T SADT) and explosion critical temperature (T b) of EP/AP composites were determined to evaluate the thermal stability of the samples. Finally, lifetime prediction of the samples was done by AKTS software.
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