固体火箭技术2023，Vol.46Issue(6)：817-823,7.DOI:10.7673/j.issn.1006-2793.2023.06.003
丁羟胶官能度分布及平均官能度对推进剂力学性能的影响
Influence of functionality distribution and average functionality of HTPB on mechanical performance of propellant
摘要
Abstract
The intrinsic reasons for the complex structure of hydroxyl-terminated polybutadiene(HTPB)were analyzed based on the free radical polymerization mechanism,and it is found that the isomerization,disproportionation termination,and chain transfer phenomena that occurred during the polymerization process are important reasons for the complexity of HTPB composition.Then,the functionality of HTPB and the cross-linked network structure of the cured elastomer were theoretically analyzed.The results show that the excess of monofunctional components in the HTPB sample is the main reason for the degradation of the mechanical properties of cured elastomers.Furthermore,the effect of HTPB functionality on the gelation rate of the HTPB/TDI cured system was analyzed ac-cording to the gel point theory,and the results indicate that the functionality of HTPB is positively correlated with the gelation rate.Finally,combined with the actual charging cases,the ideas and methods for regulating the process technology and mechanical proper-ties of HTPB propellant by optimizing the binder formula were proposed.关键词
固体推进剂/丁羟胶/质量控制/官能度/力学性能Key words
solid propellant/HTPB/quality control/functionality/mechanical property分类
航空航天引用本文复制引用
陈娟,孟德谦,张平安,刘美珍,赵海,邓剑如..丁羟胶官能度分布及平均官能度对推进剂力学性能的影响[J].固体火箭技术,2023,46(6):817-823,7.基金项目
航天化学动力技术重点实验室开放基金(STACPL120221B03). （STACPL120221B03）
