The block copolymer of 3,3’-bis(azidomethy) oxetane and glycidyl azide polymer (p(BAMO)-b-GAP) is an ideal energetic binder for solid propellants. In this work, the enthalpy of formation of p(BAMO)-b-GAP was first investigated by the heat of combustion experimental method and group additivity method. Meanwhile, the energetic characteristics of solid propellants based on the copolymer were systematically calculated. The results proved that the Δ_fH of p(BAMO)-b-GAP could be estimated accurately by two methods and the positive Δ_fH values were obtained. Dual-oxidant formulas were designed in which AP was replaced gradually by some chlorine-free high-energy materials. The calculation results showed when AP was gradually replaced by RDX or HMX, the energy level of propellants based on p(BAMO)-b-GAP was improved first but then decreased with AP content further decreased, indicating there was an optimum ratio between AP and its alternative. However, when AP was replaced by CL-20 or ADN, the values of I_sp were improved steadily. When less than 40 % AP was replaced, the contribution to the energy level of propellant by RDX or HMX was even more than that by CL-20.

中文翻译：

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基于共聚物的固体推进剂的p(BAMO)-b-GAP生成焓和能量特性

3,3'-双(叠氮基)氧杂环丁烷和缩水甘油基叠氮化物聚合物(p(BAMO)-b-GAP)的嵌段共聚物是固体推进剂的理想高能粘合剂。在这项工作中，首先通过燃烧热实验方法和基团可加性方法研究了 p(BAMO)-b-GAP 的生成焓。同时，系统计算了基于共聚物的固体推进剂的能量特性。结果证明，p(BAMO)-b-GAP的 Δ _f H 可以通过两种方法准确估计，正 Δ _f获得了 H 值。设计了双氧化剂配方，其中AP逐渐被一些无氯高能材料取代。计算结果表明，当AP逐渐被RDX或HMX取代时，基于p(BAMO)-b-GAP的推进剂能级先提高后下降，AP含量进一步降低，表明AP与HMX之间存在最佳配比。它的替代品。然而，当AP被CL-20或ADN替代时，I _sp的值稳步提高。当AP替换低于40%时，RDX或HMX对推进剂能级的贡献甚至超过CL-20。