摘要
为研究含能热塑性弹性体(ETPE)发射药微观形貌与性能的关联性,采用电子扫描电镜(SEM)对RDX/BAMO-AMMO基含能热塑性弹性体(ETPE)发射药微观形貌进行了观测,分析了工艺方法、1,5-二叠氮-3-硝基氮杂戊烷(DIANP)增塑剂含量对发射药微观形貌的影响,讨论了发射药低温冲击断面和中止燃烧熄火表面的微观形貌特征,并从发射药微观形貌角度提出了改善燃烧性能和力学性能的技术途径。结果表明,RDX/BAMO-AMMO基发射药属于高含量固体颗粒填充高分子聚合物的双相共混体系,连续相为BAMO-AMMO黏结剂基体,分散相为RDX颗粒,RDX颗粒和BAMO-AMMO黏结剂基体可形成良好的黏结界面;原生孔洞是发射药药体的主要缺陷,其低温冲击破坏主要是黏结剂基体之间的脆性断裂,而非RDX颗粒与BAMO-AMMO基体的脱黏;RDX/BAMO-AMMO基发射药燃烧过程具有明显的RDX颗粒爆燃特性,RDX颗粒爆燃及药体孔洞缺陷容易导致发射药非平行层燃烧,通过选用无溶剂成型工艺和添加DIANP增塑剂的技术途径可减少药体孔洞缺陷,药体密度由1.45g/cm^3增至1.63g/cm^3,有益于改善RDX/BAMO-AMMO基发射药的力学强度和燃烧稳定性。
In order to study the correlation between the microstructure and performances of energetic thermoplastic elastomer(ETPE)gun propellant containing RDX and BAMO-AMMO elastomer,the scanning electron microscope(SEM)was used to observe the microstructure.The effects of manufacture process and content of 1,5-diazido-3-nitrazapentane(DIANP)on microstructure of gun propellant were also analyzed.The microstructures of gun propellant cross section after impact test under low temperature and interrupted burning test were discussed,and the methods for improving the combustion performance and mechanical properties of ETPE gun propellant were obtained.The results show that RDX/BAMO-AMMO based gun propellant is a biphasic blend system filled with high content of solid particles.The continuous phase is BAMO-AMMO binder matrix,and the dispersed phase is RDX particles.The RDX particles and BAMO-AMMO binder matrix can form a good bonding interface.The native hole is the main defect of gun propellant.The breakage under impact at low temperature results from the brittle rupture of binder,not the RDX particle debonding.By using solvent-free manufacturing process and adding DIANP,the cavity defects can be reduced.The density of RDX/BAMO-AMMO based gun propellant increases from 1.45g/cm^3 to 1.63g/cm^3,which is beneficial to improve the mechanical strength and combustion stability of RDX/BAMO-AMMO based gun propellant.
作者
刘毅
肖霞
张阔
闫光虎
赵煜华
刘金玉
白薇
LIU Yi;XIAO Xia;ZHANG Kuo;YAN Guang-hu;ZHAO Yu-hua;LIU Jin-yu;BAI Wei(Xi′an Modern Chemistry Research Institute, Xi′an 710065, China)
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2020年第5期558-562,I0006,共6页
Chinese Journal of Explosives & Propellants
基金
火炸药燃烧国防科技重点实验室基金项目(No.61426030205162603002)。
