摘要
设计了一种固体推进剂固化体积收缩率测试装置,开展了HTPB/IPDI推进剂固化体积收缩率在线监测试验,获得了推进剂固化过程中的固化体积收缩率与时间变化关系,通过构建固化体积收缩率-固化度-固化动力学关联关系,获得了推进剂在固化过程中的固化度变化规律以及固化动力学模型。结果表明:HTPB/IPDI推进剂固化过程中固化体积收缩率变化呈三段式S型变化规律,最大固化体积收缩率约为0.108%,最大固化反应速率为7.809×10^(-6);在等温固化过程中HTPB/IPDI推进剂的固化反应速率曲线呈钟形曲线,推进剂热固化具有自催化特性;HTPB/IPDI推进剂自催化动力学模型的指前因子A0为379.087 s^(-1),反应级数m、n分别为0.711、1.501。研究结果为测试推进剂固化体积收缩率、明晰复合固体推进剂固化反应特征提供一种新方法。
A testing device for measuring the curing shrinkage rate of solid propellants was developed in this study.In addition,the online monitoring test of curing shrinkage of HTPB/IPDI propellant was carried out.The relationship between curing shrink-age and time during the curing process of solid propellant was obtained.By constructing the relationship between curing shrink-age,curing degree and curing kinetics,the curing degree change law and curing kinetics model of solid propellant during curing process were obtained.The results show that the curing shrinkage of solid propellants changes in a three-stage S-type.The maxi-mum curing shrinkage is about 0.108%,and the maximum curing reaction rate is 7.809×10^(-6).During the isothermal curing pro-cess,the curing reaction rate curve of HTPB/IPDI propellant shows a bell-shaped curve,so the thermal curing of solid propellant has autocatalytic characteristics.The pre-exponential factor A0 of the self-catalytic kinetics model for HTPB/IPDI propellant is 379.087 s^(-1).The reaction orders m and n are 0.711 and 1.501.The results provide a new method to test the shrinkage of propel-lant and clarify the curing reaction characteristics of composite solid propellants.
作者
周涛
杜燕桃
谢旭源
钟山伟
俞育洋
刘向阳
周东谟
ZHOU Tao;DU Yan-tao;XIE Xu-yuan;ZHONG Shan-wei;YU Yu-yang;LIU Xiang-yang;ZHOU Dong-mo(Xi'an Aerospace Chemical Power Co.,Ltd.,Xi'an 710000,China;School of Mechatronic Engineering,North University of China,Taiyuan 030051,China;School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China)
出处
《含能材料》
北大核心
2025年第6期617-624,共8页
Chinese Journal of Energetic Materials
基金
山西省基金青年项目(202103021223187)。
