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采用动态力学分析方法研究了微烟NEPE推进剂及其粘合剂胶片的动态力学性能。结果表明,微烟NEPE推进剂及其粘合剂胶片的tanδ(损耗角正切)曲线均存在α和β转变峰,分别由增塑剂和粘合剂体系的玻璃化转变引起,加入硝胺填料使两个转变过程的力学损耗tanδ增大,峰温向高温移动。微烟NEPE推进剂的试验常数和表观活化能均低于其粘合剂胶片对应的值,表明加入硝胺填料会增大粘合剂分子运动的自由体积,减弱分子链间的相互作用,可以解释微烟NEPE推进剂的力学损耗tanδ大于粘合剂胶片的原因。
Dynamic mechanical analysis was used to study the dynamic mechanical properties of NEPE propellant and its adhesive films. The results show that the tanδ (loss tangent) curve of the micro-smoke NEPE propellant and its adhesive film both have α and β transition peaks caused by the glass transition of the plasticizer and binder system, So that the two process of loss tanδ increase, the peak temperature to high temperature. The experimental constants and apparent activation energies of the NEPE propellants were both lower than those of the adhesive films, indicating that the addition of nitramine fillers would increase the free volume of the molecular motion of the binder and weaken the interaction between the molecular chains, It can be explained that the mechanical loss tanδ of the micro-smoke NEPE propellant is larger than that of the adhesive film.