摘要
为考察硝酸酯增塑聚醚(NEPE)推进剂的热老化特性,研究了其在60,70,80℃下的热失重百分数、硬度、凝胶百分数、相对交联密度以及增塑剂BTTN和NG含量的变化。结果表明:由于NEPE推进剂中增塑剂的挥发和分解,其热失重百分数、硬度随老化时间的延长而增加,因粘合剂降解断裂,其凝胶百分数和相对交联密度随老化时间的延长而降低;增塑剂BTTN和NG含量随老化时间的延长而降低,且BTTN和NG含量的损失符合一级反应规律。NEPE推进剂的热老化机理主要是增塑剂硝酸酯的分解和挥发,粘合剂的降解断链。
The thermal aging properties including the weight loss percent, the hardness, the gel fraction, the relative cross-linking density, the content of the plasticizers （BTTN and NG） were measured to analyze the aging characteristics of nitrate ester polyether （NEPE） propellant at three high temperature levels of 60 ℃ , 70 ℃ and 80℃ under the thermal air condition. The results show that the hardness and the weight loss percent of NEPE propellant increases along with the aging time because of the volatilization and decomposition of the plastieizers, and the gel fraction and the relative cross-linking density decrease because of degradation of the binder matrix, and the contents of the plasticizers （BTTN and NG） decrease and are in conformity with first-order reaction. The reasons of NEPE propellant performances deterioration are the volatilization and decomposition of the nitrate ester plasticizers, the continued-curing reaction and the degradation of the binder matrix.
出处
《含能材料》
EI
CAS
CSCD
2007年第4期332-335,共4页
Chinese Journal of Energetic Materials
基金
国家安全重大基础研究课题子专题(613380103)
关键词
应用化学
固体推进剂
老化性能
增塑剂
applied chemistry
solid propellant
aging property
plasticizer
