| 摘要: |
| 用动态热机械分析仪测定了高能交联复合推进剂NP-1的动态力学性能,并表征了在75℃下老化不同时间的力学性能。NP-1推进剂的损耗角正切tanδ曲线存在两个松弛(α和β松驰),β松弛是由混合增塑剂NG/BTTN的分子运动导致的,而α松弛则是与聚醚-聚氨酯(PET/N100)的粘合剂分子运动有关。tanδ的α松弛峰极值随老化时间的增加而增大,tanδ的α和β松弛峰温都随增塑剂NG/BTTN含量的变化而改变。此外,初步分析了NP-1推进剂失效的主要原因。 |
| 关键词: 固体推进剂 老化 动态力学性能 |
| DOI： |
| 分类号:V512 |
| 基金项目:重点实验室基金(514550303) |
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| Dynamic mechanical properties for aged NEPE propellant |
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ZHANG La-ying, HENG Shu-yun, LIU Zi-ru, ZHANG Lin-jun, Yue Pu
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Xi’an Modern Chemistry Research Inst.Xi’an 710065,China
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| Abstract: |
| The dynamic mechanical properties of a high energy cross-linked composite propellant NP-1 were measured by dynamic mechanical analysis,which characterized the mechanical properties of NP-1 aged for various times under 75℃.It is found that the two relaxations(α and β relaxation) are observed in tanδ.The β relaxation is attributed to the molecular motion of mixed plasticizer NG/BTTN while the α relaxation is attributed to motion of the polyether-polyurethane(PET/N100) binder molecule.The maximum values of α relaxation of tanδ increase with aging time.The peak temperatures of α and β relaxation of tanδ change with the content of the plasticizer NG/BTTN.In addition,the main failure reason for NP-1 propellant was preliminarily analysed. |
| Key words: Solid propellant Aging Performance of dynamic mechanics |
