端羟基聚丁二烯(HTPB)高温加速老化机理及构效关系研究  

Accelerated Aging Mechanism and Correlation of Hydroxylterminated Polybutadiene(HTPB)

作　　者：赵志星 霍亮 陈家兴 武锐 王祺 石森 李亚军 曾繁琦 吕亚栋[3] ZHAO Zhixing;HUO Liang;CHEN Jiaxing;WU Rui;WANG Qi;SHI Sen;LI Yajun;ZENG Fanqi;LYU Yadong(Military Representative Bureau of Naval Equipment Department in Xi'an,Xi'an 710000,China;Inner Mongolia Power Machinery Research Institute,Hohhot 010010,China;College of Polymer Science and Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]海军装备部驻西安地区军事代表局,西安710000 [2]内蒙动力机械研究所,呼和浩特010010 [3]四川大学高分子科学与工程学院,成都610065

出　　处：《装备环境工程》2024年第12期51-57,共7页Equipment Environmental Engineering

摘　　要：目的揭示端羟基聚丁二烯(HTPB)推进剂材料的高温加速老化机理,获得其在微观结构与宏观性能变化之间的关联。方法系统研究典型HTPB推进剂材料高温老化下的微观结构变化与宏观性能变化,重点探究其在高温加速老化下的分子机理及失效规律研究,并通过建立微观结构与宏观性能的对应关系来推断其性能变化。结果HTPB推进剂材料宏观性能随老化时间增加而变化主要是因为其微观结构损伤(基体氧化交联、界面损伤等)造成的,同时其氧化交联反应不仅发生在样品表面,在样品内部也观察到类似反应。进一步研究发现,其力学性能(拉伸强度、断裂应变)与玻璃化转变温度(tg)、α松弛峰以及凝胶含量有较强相关性。结论高温加速老化过程中,HTPB推进剂材料内部和表面均会发生氧化,同时出现填料-基体界面损伤,这些微观结构损伤主要造成了其力学性能衰减。The work aims to elucidate the high-temperature accelerated aging research and mechanistic analysis of Hydroxyl-Terminated Polybutadiene(HTPB)propellant materials,and establish a linkage between microstructural alterations and macroscopic property variations.It systematically examined the microstructural transformations and macroscopic property variations in typical HTPB propellant materials subject to high-temperature aging.The emphasis was placed on investigating the molecular mechanisms and failure modes during accelerated aging,and deducing performance variations through the establishment of a correlation between microstructure and macroscopic properties.The findings suggested that the primary cause of macroscopic property variation over time was mainly attributed to microstructural damages,such as oxidation and cross-linking of the matrix as well as the interface damage,with oxidation cross-linking reactions observed not merely on the specimen's surface but also internally.Further investigation revealed a significant correlation between mechanical properties—tensile strength,elongation at break—and glass transition temperature(tg),theα-relaxation peak,and gel content.Oxidative damage in both the internal and surface regions of HTPB propellant materials,accompanied by filler-matrix interface damage during the high-temperature accelerated aging process,fundamentally results in the decline of mechanical properties.

关 键 词：推进剂材料 老化机理 宏观性能 微观结构 构效关系 加速老化评价方法 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]