Hydroxyl-terminated polybutadiene (HTPB) is commonly used as a binder ingredient in composite propellants. In this study, a plasticizer was added to the binder to promote its plasticity and flexibility. Glycerol propoxylate (GPO) is a triol material with a zigzag structure, and it has one oxygen atom in a repeating unit. GPO would be a good plasticizer for HTPB binder to obtain good elasticity; furthermore, it would be suitable for improving the burning characteristics of the HTPB propellant. The addition of GPO to the HTPB binder was effective in extending the pot life and improving the mechanical properties of the propellant. The thermal decomposition behaviors of the HTPB/GPO blends were almost the same as that of the HTPB binder, except that the beginning consumption temperature of the blends was lower than that of HTPB. The ignitability at low pressure for the ammonium nitrate-based propellant was improved by using the HTPB/GPO binder, whereas GPO did not enhance the burning rate of the propellant.

中文翻译：

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端羟基聚丁二烯/丙酸甘油酯共混物的力学性能和热分解行为及其在硝酸铵基推进剂中的应用

端羟基聚丁二烯 (HTPB) 通常用作复合推进剂中的粘合剂成分。在这项研究中，将增塑剂添加到粘合剂中以提高其可塑性和柔韧性。甘油丙氧基化物（GPO）是一种具有锯齿形结构的三醇材料，其重复单元中有一个氧原子。GPO 是 HTPB 粘合剂的良好增塑剂，以获得良好的弹性；此外，它将适用于改善HTPB推进剂的燃烧特性。将 GPO 添加到 HTPB 粘合剂中可有效延长适用期并改善推进剂的机械性能。HTPB/GPO 共混物的热分解行为与 HTPB 粘合剂几乎相同，只是共混物的起始消耗温度低于 HTPB。