摘要
回顾了丁羟推进剂湿老化与干燥恢复机理研究状况;指出了水分对氢键结构的影响;讨论了干燥条件下吸湿后的推进剂内部水分运行规律;以120 mm×25 mm×10 mm的长方体丁羟推进剂试样为研究对象,在多种温度和相对湿度(RH)条件下进行了湿老化试验;以30℃、RH=100%条件下湿老化5 d的长方体试样为研究对象,采用无水氯化锂作干燥剂进行了30℃的干燥恢复试验;对湿老化和干燥恢复后的推进剂进行了单向拉伸试验,并对拉伸断面拍摄了高分辨率微距数码照片,对湿老化后的部分试样进行了衰减全反射红外光谱分析。结果表明,吸湿初期主要是推进剂基体内部的氢键发生变化,吸湿后期推进剂基体与AP颗粒之间的氢键才可能发生变化;从前一种变化发展到后一种变化,要求吸湿率大于某一临界值;吸湿后氢键数量增多,红外特征频率低移。
The mechanism of moisture ageing and drying recovery of HTPB propellant was reviewed,and a study was made on how water affects hydrogen bond.Discussion of water moving law within the propellant containing moisture was conducted during the drying recovery.With cuboid HTPB propellant samples of 120 mm×25 mm×10 mm dimensions treated as the study object,moisture ageing tests were done to them under several temperatures and relative humidities（RH）.Cuboid samples that had been aged for 5 d at 30 ℃ and RH=100% treated as the study object,drying recovery tests with LiCl were done to them at 30 ℃.Some tensile tests were done after moisture ageing and drying recovery tests.Some high pixel photos were taken to the tensile break surface.Attenuated total reflectance infrared spectrum analysis was done to some samples after moisture ageing tests.The results show that the hydrogen bonds in propellant matrix primarily change at the beginning of the moisture ageing,and the hydrogen bonds between propellant matrix and AP change in the evening of the moisture ageing.The change from the former to the latter needs the moisture absorption percent greater than some critical value.The increase of hydrogen bonds number causes the infrared character frequency to decrease.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2011年第4期482-487,共6页
Journal of Solid Rocket Technology
基金
总装备部武器装备预研基金(51328040104)
关键词
丁羟推进剂
氢键
湿老化
干燥恢复
红外光谱
HTPB propellant
hydrogen bond
moisture ageing
drying recovery
infrared spectrum
