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[1]齐晓飞,闫宁,严启龙,等.NC/DIANP共混体系的宏微观力学性能[J].火炸药学报,2019,42(3):268-273.[doi:10.14077/j.issn.1007-7812.2019.03.010]
 QI Xiao-fei,YAN Ning,YAN Qi-long,et al.Macro and Micro Mechanical Properties of NC/DIANP Blend[J].,2019,42(3):268-273.[doi:10.14077/j.issn.1007-7812.2019.03.010]
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NC/DIANP共混体系的宏微观力学性能()
     
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《火炸药学报》[ISSN:1007-7812/CN:61-1310/TJ]

卷:
42卷
期数:
2019年第3期
页码:
268-273
栏目:
出版日期:
2019-06-30

文章信息/Info

Title:
Macro and Micro Mechanical Properties of NC/DIANP Blend
作者:
齐晓飞 闫宁 严启龙 李宏岩 汤志智 刘佩进
1. 西安近代化学研究所, 陕西 西安 710065;
2. 西北工业大学燃烧、热结构与内流场重点实验室, 陕西 西安 710072;
3. 陆军装备部驻沈阳地区军代局, 辽宁 沈阳 110015
Author(s):
QI Xiao-fei YAN Ning YAN Qi-long LI Hong-yan TANG Zhi-zhi LIU Pei-jin
1. Xi’an Modern Chemistry Research Institute, Xi’an 710065, China;
2. Science and Technology on Combustion, Internal Flow and Thermo-structure Laboratory, Northwestern Polytechnical University, Xi’an 710072, China;
3. Army Equipment Department in Shenyang Military Representative Office, Shenyang 110015, China
关键词:
物理化学15-二叠氮-3-硝基氮杂戊烷(DIANP)硝化纤维素(NC)力学性能改性双基推进剂分子动力学模拟
Keywords:
physical chemistry15-diazido-3-nitrazapentane (DIANP)nitrocellulose (NC)mechanical propertiesmodified double-base propellantmolecular dynamics simulation
分类号:
TJ55;O641
DOI:
10.14077/j.issn.1007-7812.2019.03.010
文献标志码:
-
摘要:
为研究硝化甘油/1,5-二叠氮-3-硝基氮杂戊烷(NC/DIANP)共混体系宏观力学性能表现的微观机理实质,用动态热机械分析和单向拉伸实验对比研究了NC/DIANP和NC/NG共混体系的动态和静态力学性能,并在此基础上建立了两种共混体系模型,通过分子动力学模拟分析了微观作用机理。结果表明,DIANP取代NG后,共混体系的自由体积增加且氢键作用力和范德华力减弱,NC分子链链段运动能力增强,共混体系α松弛峰温由75.6℃降至53.5℃、力学损耗强度由0.567增至0.778,β松弛峰温由-23.7℃降至-25.0℃、力学损耗强度由0.126增至0.127,-40、20和50℃的最大拉伸强度由15.31、12.11和5.13 MPa分别减小至14.24、10.08和1.90 MPa,最大伸长率由1.78%、8.08%和36.01%分别增至2.91%、24.56%和61.51%。
Abstract:
In order to explore inherent factors that determine the mechanical properties of nitrocellulose/1,5-diazido-3-nitrazapentane (NC/DIANP) blend, the dynamic and static mechanical properties of NC/DIANP and nitrocellulose/nitroglycerine (NC/NG) blends were investigated by dynamic mechanical analysis and uniaxial tension test. The models of NC/DIANP and NC/NG blends were built, and the mechanism in change of mechanical properties was further evaluated by using molecular dynamics simulation. The results show that when replacing NC with DIANP, the free volume increases, both hydrogen bond and Van der waals force of NC decrease, and the mobility of NC molecular chains strengthen, which makes the α-transition peak temperature decrease from 75.6 to 53.5℃ and the mechanical loss peak value increase from 0.567 to 0.778, the β-transition peak temperature decrease from -23.7 to -25.0℃ and the mechanical loss peak value increase from 0.126 to 0.127. Meantime, the maximum tensile strength decrease from 15.31, 12.11 and 5.13 MPa to 14.24, 10.08 and 1.90 MPa with maximum elongation rate increase from 1.78%, 8.08%, 36.01% to 2.91%, 24.56%, 61.51% at -40, 20 and 50℃, respectively.

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备注/Memo

备注/Memo:
收稿日期:2018-8-11;改回日期:2018-10-11。
基金项目:国家自然科学基金(No.21703167)
作者简介:齐晓飞(1981-),男,副研究员,博士研究生,从事固体推进剂研究。E-mail:fayeqee@aliyun.com
通讯作者:刘佩进(1971-),男,教授,博士,从事固体火箭发动机研究。E-mail:liupj@nwpu.edu.cn
更新日期/Last Update: 1900-01-01