Polytriazole polyethylene oxide‐tetrahydrofuran (PTPET) is an energetic propellant elastomer that is prepared using glycidyl azide polymer and trifunctional alkynyl‐terminated polyethylene oxide‐tetrahydrofuran. Its thermal decomposition, determined using thermogravimetic analysis, showed two mass‐loss peaks largely related to the decomposition of azide groups and the main chain. Flynn‐Wall‐Ozawa and Kissinger‐Akahira‐Sunose methods were deployed to obtain kinetic triplet parameters of PTPET thermal decomposition by the traditional model‐free method; the Coats‐Redfern approach was used as the model‐fitting method. Kinetics analysis indicated that the mechanism of the two‐step reactions were the primary‐reaction of first order and the power‐law phase reaction of the 2/3 order. The first decomposition stage of PTPET had an activation energy (E_a) of 113 to 116 kJ/mol while the second was 196 to 210 kJ/mol. The thermal decomposition of PTPET with different heating rates and mechanisms showed good kinetic compensation effects, the gas products being further studied with TG‐FTIR.

中文翻译：

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聚三唑聚环氧乙烷-四氢呋喃弹性体的多步热分解行为研究

聚三唑聚环氧乙烷-四氢呋喃（PTPET）是一种高能推进剂弹性体，它是使用缩水甘油基叠氮化物聚合物和三官能炔基封端的聚环氧乙烷-四氢呋喃制备的。使用热重分析确定的热分解显示出两个质量损失峰，这与叠氮化物基团和主链的分解主要相关。运用Flynn-Wall-Ozawa和Kissinger-Akahira-Sunose方法，通过传统的无模型方法获得PTPET热分解的动力学三重态参数。Coats-Redfern方法被用作模型拟合方法。动力学分析表明，两步反应的机理是一阶的初反应和2/3阶的幂律相反应。PTPET的第一分解阶段具有活化能（E _a）为113至116 kJ / mol，而第二个为196至210 kJ / mol。不同升温速率和机理的PTPET的热分解显示出良好的动力学补偿效果，气体产物用TG-FTIR进行了进一步研究。