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ETPE(含能热塑性弹性体)具有力学性能好、能量大和不敏感等特性,因而已成为近年来国内外推进剂用黏合剂的理想基体。以BAMO-AMMO(3,3-二叠氮甲基氧杂环丁烷/3-甲基-3-叠氮甲基氧杂环丁烷嵌段共聚物)作为ETPE,制备了固体推进剂用黏合剂,并着重探讨了BAMO-AMMO黏合剂的Mr(相对分子质量)对推进剂力学性能、动态力学性能和微观结构等影响。研究结果表明:随着黏合剂Mr的增加,推进剂的高温拉伸强度、低温断裂伸长率、储能模量和弹性等均随之增大,而Tg(玻璃化转变温度)降低;然而,当黏合剂Mr过高时,推进剂复合体系中易出现分层现象。
ETPE (functional thermoplastic elastomer) has good mechanical properties, energy and insensitivity and other characteristics, which has become an ideal binder for propellants at home and abroad in recent years. A solid propellant was prepared using BAMO-AMMO (3,3-diazidomethyloxetane / 3-methyl-3-azidomethyloxetane block copolymer) as ETPE The effects of Mr (relative molecular mass) of BAMO-AMMO binder on the mechanical properties, dynamic mechanical properties and microstructure of propellants were also discussed. The results show that with the increase of binder Mr, the high-temperature tensile strength, low-temperature elongation at break, storage modulus and elasticity of propellants increase with the increasing of binder, while the Tg decreases. However, When the binder Mr is too high, the delamination phenomenon tends to occur in the propellant composite system.