|本期目录/Table of Contents|

[1]安静,丁黎,梁忆,等.温度和压力载荷作用下NEPE推进剂的老化性能[J].火炸药学报,2019,42(4):375-379.[doi:10.14077/j.issn.1007-7812.2019.04.010]
 AN Jing,DING Li,LIANG Yi,et al.Aging Properties of NEPE Propellant under Temperature and Pressure Loading Action[J].,2019,42(4):375-379.[doi:10.14077/j.issn.1007-7812.2019.04.010]
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温度和压力载荷作用下NEPE推进剂的老化性能()
     
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《火炸药学报》[ISSN:1007-7812/CN:61-1310/TJ]

卷:
42卷
期数:
2019年第4期
页码:
375-379
栏目:
出版日期:
2019-08-31

文章信息/Info

Title:
Aging Properties of NEPE Propellant under Temperature and Pressure Loading Action
作者:
安静 丁黎 梁忆 祝艳龙 周静 杜姣姣 王克勇
西安近代化学研究所, 陕西 西安 710065
Author(s):
AN Jing DING Li LIANG Yi ZHU Yan-long ZHOU Jing DU Jiao-jiao WANG Ke-yong
Xi’an Modern Chemistry Research Institute, Xi’an 710065, China
关键词:
物理化学NEPE推进剂老化性能失效模式交联密度动态力学性能脱湿现象
Keywords:
physical chemistryNEPE propellantaging propertyfailure modelcross-linking densitydynamic mechanical propertiesdehumidification phenomenon
分类号:
TJ55;O64
DOI:
10.14077/j.issn.1007-7812.2019.04.010
文献标志码:
-
摘要:
为研究NEPE推进剂在诱发压力载荷作用下的老化性能,在75℃、1 MPa下进行了双应力加速寿命试验,研究了温度和压力对NEPE推进剂燃烧性能、能量性能、力学性能和安全特性的影响;采用交联密度、动态力学性能及扫描电镜分析了NEPE推进剂力学性能的变化机理。结果表明,在75℃、1 MPa下,30 d加速老化过程中,在温度和压力的共同作用下,NEPE推进剂爆热为6 007~6 192 kJ/kg、燃速为10.36~10.64 mm/s、安定剂质量分数为0.43%~0.48%,均不随老化时间的增加而变化;抗拉强度随老化时间的增加而降低,老化30 d后,抗拉强度由0.612 MPa降至0.433 MPa,变化率29.2%,表明力学性能的变化是推进剂的主要失效模式;温度和压力双应力载荷作用下失效机理为温度使黏合剂降解,交联网络中结点受到破坏及固体颗粒分解引起脱湿,压力的存在强化了脱湿现象,导致力学强度快速下降。
Abstract:
To study the aging properties under loading action of induced pressure on nitrate ester plasticized polyether (NEPE) propellant, double stress accelerated life tests were performed at 75℃ and 1 MPa. The effects of temperature and pressure on the combustion, energy, mechanical properties, safety characteristics of NEPE propellant were studied. The change mechanism of mechanical properties of NEPE propellant was analyzed by cross-linking density, dynamic mechanical properties and scanning electron microscopy. The results show that during accelerated aging at 75℃ and 1 MPa for 30 days under the combined action of temperature and pressure, the heat of detonation of NEPE propellant is 6 007-6 192 kJ/kg, the burning rates is 10.36-10.64 mm/s, the mass fraction of stabilizer is 0.43%-0.48%, which do not change with aging time. The tensile strength decreases with the increase of aging time, and its value decreases from 0.612 MPa to 0.433 MPa with a change rate of 29.2% after 30 days of aging, indicating that the change of mechanical properties is the main failure model of propellant. The failure mechanism under the temperature-pressure double stress loading action is that temperature degrades the binder, destroys the nodes in cross-linking network and decomposes the solid particles to cause dehumidification, and the compressive stress strengthens the dehumidification phenomenon, which leads to the rapid decrease of mechanical strength.

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备注/Memo

备注/Memo:
收稿日期:2018-01-14;改回日期:2018-06-11。
基金项目:国家自然科学基金(No.21805223;No.21805226);国防科技工业技术基础研究项目(No.H092011A001)
作者简介:安静(1988-),女,助理研究员,从事火炸药热性能及理化性能研究。E-mail:a11115anjing@126.com
通讯作者:丁黎(1970-),女,研究员,从事火炸药热性能及理化性能研究。E-mail:dingli166@163.com
更新日期/Last Update: 1900-01-01