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采用最小自由能法,在标准条件(pc/p0=70∶1)下,比较了用不同软硬段结构的含能热塑性聚氨酯弹性体(ET-PU)作粘合剂的复合推进剂的能量特性,从要获得较高能量水平的观点,排列出了几种ETPU选择的先后次序;计算了含ETPU的各类推进剂的能量特性参数,探讨了ETPU对硝酸酯增塑的复合推进剂和硝胺改性双基推进剂的能量特性的影响规律。结果表明,选用不同ETPU的复合推进剂配方相互间在能量特性上存在着差别,但这种差别并不十分显著,以GAP为软段、TDI为硬段的ETPU,更有利于配方获得较高的能量水平;硝酸酯增塑的ETPU推进剂的理论能量水平高于丁羟推进剂,随增塑比逐渐增大,推进剂的最大理论比冲随之增大,固含量逐步降低;少量ETPU的加入,对硝胺改性双基推进剂的能量特性影响不大,增加Al和RDX含量,更有利于提高含ETPU的硝胺改性双基推进剂的能量水平。
Under the standard conditions (pc / p0 = 70: 1), the energy of the composite propellants with different soft and hard segments of the functional thermoplastic polyurethane elastomer (ET-PU) Characteristics, from the point of view to obtain a higher energy level, sorted out the order of selection of ETPU; calculated energy parameters of various types of propellant containing ETPU parameters, discussed ETPU nitrate plasticized composite propellant and Influence of Nitramine Modified Double Base Propellant on Energy Characteristics. The results show that there are differences in the energy characteristics of the composite propellants with different ETPU, but the difference is not very significant. The ETPU with GAP as the soft segment and TDI as the hard segment is more beneficial to the formula The theoretical energy level of nitrate-plasticized ETPU propellant is higher than that of butyroxide propellant. With the increase of plasticizing ratio, the maximum theoretical specific impulse of propellant increases with the increase of solid content. A small amount of ETPU , Which has little effect on the energy characteristics of nitroamine-modified double-base propellants. Increasing the contents of Al and RDX is more conducive to raising the energy level of nitramine-modified double base propellants containing ETPU.