| 引用本文: | 郭宇,申志彬,李海阳,等.长贮过程中发动机HTPB推进剂老化机理分析.[J].国防科技大学学报,2023,45(1):95-101.[点击复制] |
| GUO Yu,SHEN Zhibin,LI Haiyang,et al.Investigation on the aging mechanism of HTPB propellant in SRM long-term storage[J].Journal of National University of Defense Technology,2023,45(1):95-101[点击复制] |
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| 长贮过程中发动机HTPB推进剂老化机理分析 |
| 郭宇1,2,3,申志彬1,2,李海阳1,2,张漩3,李志杰3 |
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(1. 国防科技大学 空天科学学院, 湖南 长沙 410073;2. 空天任务智能规划与仿真湖南省重点实验室, 湖南 长沙 410073;3. 中国航天科工集团公司六院四十一所, 内蒙古 呼和浩特 010010)
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| 摘要: |
| 为揭示固体推进剂在长期贮存过程中的老化机理,解剖了自然贮存19年贴壁浇注的端羟基聚丁二烯橡胶推进剂装药发动机,沿着药柱径向不同位置进行了取样,并采用扫描电镜、能量色散X射线光谱仪、红外吸收光谱、交联密度等多种手段对这些样品进行了测试分析。研究发现:贴壁浇注发动机药柱不同位置推进剂的老化程度不尽相同,越靠近非金属壳体位置,推进剂的老化程度越严重。进一步深入分析表明:除了丁羟胶中双键的氧化断链和端羟基的缩合等影响推进剂老化,铝粉氧化产生的铝离子会催化丁羟胶双键与氯气或水发生加成反应生成CCl双键和仲醇,而铝离子迁移和分布的不均匀会引起药柱老化的不均匀性。研究结果对推进剂配方设计和防老化措施的研究具有重要意义。 |
| 关键词: 固体发动机 端羟基聚丁二烯橡胶 固体推进剂 长期贮存 老化机理 |
| DOI：10.11887/j.cn.202301010 |
| 投稿日期：2020-12-02 |
| 基金项目:国家自然科学基金资助项目(11872372) |
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| Investigation on the aging mechanism of HTPB propellant in SRM long-term storage |
| GUO Yu1,2,3, SHEN Zhibin1,2, LI Haiyang1,2, ZHANG Xuan3, LI Zhijie3 |
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(1. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;2. Hunan Key Laboratory of Intelligent Planning and Simulation for Aerospace Missions, Changsha 410073, China;3. The 41 st Institute of the Sixth Academy of CASIC, Huhhot 010010, China)
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| Abstract: |
| In order to reveal the aging mechanism of solid propellant grain during the long-term storage, a HTPB (hydroxyl-terminated polybutadiene) propellant rocket motor which was moulded by casting and stored naturally for 19 years was dissected. Samples were taken along the radial position of the propellant grains, and were tested and analyzed by means of SEM(scanning electron microscope), EDX(energy dispersive X-ray spectrometer), infrared absorption spectroscopy and cross-linking density. Results show that the aging degree of propellant is not the same at different positions of grain. The closer the position is to the non-metallic case, the more serious the aging degree of propellant is. Further analysis shows that, in addition to the effects of CC double bond oxidation chain breaking and condensation of —OH on propellant aging, Al3+ ions produced by the oxidation of Al powder catalyzes the addition reaction of HTPB′s CC double bond with Cl2 or water to form CCl double bond and secondary alcohol, and the uneven migration and distribution of aluminum ions will cause the uneven aging of grain. The research results are of great significance to the improvement of propellant aging performance and the research of anti-aging measures. |
| Keywords: solid rocket motor hydroxyl-terminated polybutadiene solid propellant long-term storage aging mechanics |
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