X射线光电子能谱在HTPB推进剂老化机理研究中的应用  

Application of X-ray Photoelectron Spectroscopy in Investigating Aging Mechanism of HTPB Propellant

作　　者：魏小琴[1,2] 杨万均[1,2] 罗天元[1,2] 黄文明[1,2] 李泽华[1,2] 

机构地区：[1]西南技术工程研究所,重庆400039 [2]国防科技工业自然环境试验研究中心,重庆400039

出　　处：《装备环境工程》2013年第5期52-57,共6页Equipment Environmental Engineering

摘　　要：采用X射线光电子能谱(XPS)法研究了HTPB推进剂在80℃热空气烘箱内分别老化0周、13周和24周的元素组成、化学价态及含量变化。通过拟合C,O,N,Cl等元素的XPS谱图,推测该推进剂在常温(25℃)贮存老化初期应是氧化交联,后期则出现降解断链,并认为NH4ClO4缓慢分解,攻击C C不饱和双键,使得C C双键含量降低是HTPB推进剂老化失效的主要原因。Al粉被包裹在推进剂粘合剂内部,XPS法未能检出Al粉。由于Al粉比较稳定,不参与推进剂老化过程,故XPS仍可用于HTPB推进剂老化机理研究。Elementary composition,chemical valence,and content change of HTPB propellant stored in 80 ℃ hot air for 0,13,and 24 weeks were investigated using X-ray photoelectron spectroscopy.It was concluded that HTPB propellant at normal-temperature（25 ℃） storage is oxidation crosslinking in earlier aging stage and degradation in later aging stage via fitting XPS spectrogram of C,O,N and Cl elements;the main reason of HTPB propellant aging failure is that NH4 ClO4 is slowly decomposed to attack unsaturated C C double bond and then results in lower content of C C double bond.

关 键 词：X射线光电子能谱 固体推进剂 老化机理 

分 类 号：TQ317.6[化学工程—高聚物工业]