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采用差示扫描量热/热重(DSC/TG)和裂解气相色谱质谱联用(Py–GC/MS)分析技术研究了PET黏合剂体系、PET/TDI弹性体以及含PET黏合剂体系的简单组分推进剂的热分解特性和热裂解产物状况,探索了PET弹性体的热分解与含PET黏合剂体系的推进剂热解性能之间的相关性。研究结果表明,混合硝酸酯增塑的PET黏合剂体系和PET/TDI弹性体的热分解过程分为2个阶段:硝酸酯的挥发和分解,PET的分解。引入氧化剂AP后制成的推进剂的热分解行为是上述热分解行为的共同作用,其中AP的存在促进了黏合剂体系中混合硝酸酯和PET的分解,Al粉对该体系的热分解行为没有明显影响。PET弹性体的热分解行为是此类推进剂热分解的重要组成部分,它的热分解行为基本上能反映相关推进剂的热分解行为。
The PET adhesive system, PET / TDI elastomer and PET-containing adhesive system were studied by differential scanning calorimetry / thermogravimetry (DSC / TG) and Pyrolysis Gas Chromatography-Mass Spectrometry (Py-GC / MS) The thermal decomposition characteristics of the component propellants and the state of the pyrolyzed products, and explored the correlation between the thermal decomposition of the PET elastomers and the pyrolytic performance of the propellant containing the PET binder system. The results showed that the thermal decomposition process of PET binders mixed with nitrates and PET / TDI elastomers was divided into two stages: the volatilization and decomposition of nitrates and the decomposition of PET. The thermal decomposition behavior of the propellants after the introduction of oxidant AP is the common action of the above thermal decomposition behavior, in which the presence of AP promotes the decomposition of mixed nitrate and PET in the binder system, and the thermal decomposition behavior of Al powder on the system is not Clearly affected. The thermal decomposition behavior of PET elastomers is an important part of the thermal decomposition of such propellants. The thermal decomposition behavior of PET elastomers basically reflects the thermal decomposition behavior of the relevant propellants.