In order to study the accelerated aging law of nitrate ester plasticized polyether (NEPE) propellants, the mechanical properties, weight loss, adhesive network structure fracture, and stability of NEPE propellants during storage were analyzed. The results show that the maximum tensile strength σm shows good change law with the increase of storage time, and the failure of NEPE propellants is mainly strength failure. The content of the stabilizer decreased with the increase of storage time. With the prolongation of storage time, the weight loss ratio increases gradually with good regularity. The decomposition of the components in the propellant leads to the degradation of the polyethylene glycol (PEG) network structure. The thermal decomposition of the nitrate plasticizer in NEPE propellants will occur, and the products will cause the adhesive network structure to decompose and break the chain, leading to the destruction of the matrix structure. The thermal decomposition of the propellant has temperature-increasing rate dependency.

中文翻译：

---

NEPE推进剂加速老化规律综合评价

为研究硝酸酯增塑聚醚（NEPE）推进剂的加速老化规律，对NEPE推进剂的力学性能、失重、黏附网络结构断裂和储存稳定性进行了分析。结果表明，最大抗拉强度σm随着储存时间的增加呈现出良好的变化规律，NEPE推进剂的失效主要是强度失效。稳定剂的含量随着储存时间的增加而降低。随着贮藏时间的延长，失重率逐渐增加，有较好的规律性。推进剂中组分的分解导致聚乙二醇（PEG）网络结构的降解。NEPE推进剂中的硝酸盐增塑剂会发生热分解，产物会引起粘合剂网络结构的分解和断链，导致基体结构的破坏。推进剂的热分解具有升温速率依赖性。