火炸药学报
火炸藥學報
화작약학보
CHINESE JOURNAL OF EXPLOSIVES & PROPELLANTS
2014年
6期
65-69
,共5页
物理化学%RDX/AP-NEPE推进剂%热分解%5 s 爆发点%湿热环境
物理化學%RDX/AP-NEPE推進劑%熱分解%5 s 爆髮點%濕熱環境
물이화학%RDX/AP-NEPE추진제%열분해%5 s 폭발점%습열배경
physical chemistry%RDX/AP-NEPE propellant%thermal decomposition%5 s delay explosion tempera-ture%humid and hot environment
用TG、5 s 爆发点和单向拉伸试验，研究了湿热环境对 RDX／AP-NEPE 推进剂热安全性和力学性能的影响。结果表明，在相对湿度70％、温度75℃下经历6d的湿热老化后，RDX／AP-NEPE推进剂在TG曲线上的3个质量损失阶段的表观活化能均略有降低，水分对AP分解活化能的影响较为明显，使其活化能降低9．3％。湿热老化前后，5s爆发点Tb 分别为303．7℃和302．7℃。随着老化时间的增加，延伸率和抗拉强度都呈降低趋势，至第6 d延伸率从106．0％降至36．7％，抗拉强度从0．631 MPa 降至0．541 MPa。在75℃下干燥热老化6d 后，RDX／AP-NEPE推进剂3个阶段的表观活化能、5 s 爆发点、抗拉强度和延伸率都没有明显的变化。初期老化过程中，水分对RDX／AP-NEPE推进剂的力学性能和AP的分解活化能影响较大，但对热感度基本没有影响。
用TG、5 s 爆髮點和單嚮拉伸試驗，研究瞭濕熱環境對 RDX／AP-NEPE 推進劑熱安全性和力學性能的影響。結果錶明，在相對濕度70％、溫度75℃下經歷6d的濕熱老化後，RDX／AP-NEPE推進劑在TG麯線上的3箇質量損失階段的錶觀活化能均略有降低，水分對AP分解活化能的影響較為明顯，使其活化能降低9．3％。濕熱老化前後，5s爆髮點Tb 分彆為303．7℃和302．7℃。隨著老化時間的增加，延伸率和抗拉彊度都呈降低趨勢，至第6 d延伸率從106．0％降至36．7％，抗拉彊度從0．631 MPa 降至0．541 MPa。在75℃下榦燥熱老化6d 後，RDX／AP-NEPE推進劑3箇階段的錶觀活化能、5 s 爆髮點、抗拉彊度和延伸率都沒有明顯的變化。初期老化過程中，水分對RDX／AP-NEPE推進劑的力學性能和AP的分解活化能影響較大，但對熱感度基本沒有影響。
용TG、5 s 폭발점화단향랍신시험，연구료습열배경대 RDX／AP-NEPE 추진제열안전성화역학성능적영향。결과표명，재상대습도70％、온도75℃하경력6d적습열노화후，RDX／AP-NEPE추진제재TG곡선상적3개질량손실계단적표관활화능균략유강저，수분대AP분해활화능적영향교위명현，사기활화능강저9．3％。습열노화전후，5s폭발점Tb 분별위303．7℃화302．7℃。수착노화시간적증가，연신솔화항랍강도도정강저추세，지제6 d연신솔종106．0％강지36．7％，항랍강도종0．631 MPa 강지0．541 MPa。재75℃하간조열노화6d 후，RDX／AP-NEPE추진제3개계단적표관활화능、5 s 폭발점、항랍강도화연신솔도몰유명현적변화。초기노화과정중，수분대RDX／AP-NEPE추진제적역학성능화AP적분해활화능영향교대，단대열감도기본몰유영향。
The effect of humid and hot environment on the thermal safety and mechanical properties of RDX/AP-NEPE propellant was studied by means of TG,5s delay explosion temperature test and unilateral tensile test. Results show that after 6 days of humid and hot aging under relative humidity of 70% and temperature of 75℃,the apparent activation energies of RDX/AP-NEPE propellant for three mass loss steps on TG curve are slightly lower, and the effect of water on the activation energy of AP decomposition reaction is more obvious,making the activation energy reduce by 9.3%.Its 5s delay explosion temperatures Tb before and after humid and hot aging are 303.7℃and 302.7℃,respectively.With prolonging the aging time,the elongation rate and the tensile strength gradually decreases.Until sixth day,the elongation rate reduces from 106.0% to 36.7%,and tensile strength reduces from 0. 631MPa to 0.541 MPa.However,the apparent activation energy,5s delay explosion temperatures,tensile strength and elongation rate of RDX/AP-NEPE propellant for three mass loss steps after 6 days of humid and hot aging under 75℃ do not change significantly.In early aging process,water has great effect on the mechanical properties of RDX/AP-NEPE propellant and activation energy of AP decomposition reaction,but it basically has no effect on its thermal sensitivity.
