基于红外光谱的HTPB推进剂老化机理  

Aging mechanism of HTPB propellant based on infrared spectrum

作　　者：王昕远 张亚俊[2] 隋欣[1] 陶涛 WANG Xinyuan;ZHANG Yajun;SUI Xin;TAO Tao(School of Aerospace Technology,Beijing Institute of Technology,Beijing 100081,China;Xi’an Modern Chemistry Research Institute,Xi’an 710065,China)

机构地区：[1]北京理工大学宇航学院,北京100081 [2]西安近代化学研究所,西安710065

出　　处：《固体火箭技术》2019年第4期471-475,共5页Journal of Solid Rocket Technology

基　　金：北京理工大学科技创新计划;火炸药全链条创新专项

摘　　要：为从红外光谱角度研究HTPB推进剂贮存过程中老化机理,开展了70℃下推进剂试样的加速老化试验,并测得加速老化过程中15个时间节点的试样红外吸收光谱及最大延伸率数据,通过对二者变化规律的相关性分析,找到了与最大延伸率变化相关度较高的红外特征波数及其对应的特征官能团—OH、C=O、NH4^+,且这些官能团特征吸收峰强度与最大延伸率均呈总体下降趋势。研究结果表明在加速老化过程中,推进剂试样中存在的主要老化机理是消耗—OH与C=O的后固化反应以及会导致NH_4^+含量降低的氧化交联反应。同时,红外光谱分析的实验结果,与以往传统研究方法所揭示的HTPB推进剂主要老化机理一致,印证了红外光谱法的正确性,也说明它具备进一步发展为定量反映推进剂老化性能工具的潜力。In order to study the aging characteristic mechanism of HTPB propellant from the perspective of infrared spectrum,the accelerated aging test of HTPB propellant at 70 ℃ was carried out,moreover the maximum elongation and infrared absorption spectrum were measured at 15 different aging time.By analyzing the relevance between the changes of absorption spectrum and the maximum elongation of the samples, infrared characteristic wave number closely related to elongation and its corresponding characteristic functional groups -OH,C=O,and NH + 4were found,moreover both characteristic absorption peak intensity and maximum elongation present a general downward tendency.The results show that during accelerated aging process, the main aging mechanism of HTPB propellant samples is post-curing reaction consuming -OH,C=O,and oxidative crosslinking reaction resulting in reduction of NH + 4 content. At the same time,thess results are consistent with those obtained from traditional methods,which indicates that infrared spectroscopy will become a tool quantitatively reflects aging properties of HTPB propellant.

关 键 词：HTPB推进剂 加速老化试验 红外光谱 最大延伸率 老化机理 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]