Bu-NENA基改性双基推进剂的力学性能及安全性能  

Mechanical Performance and Security Performance of Bu-NENA Based Modified Double-base Propellant

作　　者：孙世雄 赵本波[1,2] 桑超 程原[1,2] 罗运军 SUN Shi-xiong;ZHAO Ben-bo;SANG Chao;CHENG Yuan;LUO Yun-jun(School of Chemical Engineering and Technology,North University of China,Taiyuan 030051,China;Dezhou Industrial Technology Research Institute of North University of China,Dezhou Shandong 253034,China;School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China;Key Laboratory of High Energy Density Materials of Ministry of Education,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]中北大学化学工程与技术学院,山西太原030051 [2]中北大学德州产业技术研究院,山东德州253034 [3]北京理工大学材料学院,北京100081 [4]北京理工大学高能量密度材料教育部重点实验室,北京100081

出　　处：《火炸药学报》2022年第4期561-566,共6页Chinese Journal of Explosives & Propellants

摘　　要：为提高高固含量改性双基推进剂的低温力学性能和安全性能,以N-丁基硝氧乙基硝胺(Bu-NENA)代替硝化甘油(NG),采用无溶剂工艺制备了改性双基推进剂;采用万能试验拉伸机、动态热机械分析仪和感度测试仪等对推进剂的力学性能和机械感度进行了表征。结果表明,与NG相比,Bu-NENA可明显提高推进剂的低温力学性能,降低推进剂的机械感度。当Bu-NENA质量分数为19.1%时,推进剂(代号B3)的力学性能较好,与空白对照推进剂(NG基改性双基推进剂,代号B0)相比,B3推进剂在-40℃延伸率由3.54%提高到7.57%,提高了114%,高温拉伸强度相当;摩擦感度由46%降低至2%,降低了95.7%;特性落高H_(50)由17.2cm提高到33.6cm,提高了95.3%;动态力学性能研究表明,Bu-NENA对硝化纤维素(NC)塑化效果较好,B3推进剂的β转变温度由B0的-33.8℃降低至-37.8℃,韧性有所增强。表明该推进剂不仅机械感度明显降低,且低温力学性能明显改善,在短射程战术武器中具有一定的应用前景。A novel double-base propellant plasticized by Bu-NENA which substitutes NG with high solid content was prepared by solvent-free process to improve mechanical and security performance.The tensile mechanical performance,dynamic mechanical properties,and mechanical sensitivities were tested by universal tensile tester,dynamic thermomechanical analyzer and sensitive testers.The results showed that,compared with NG,Bu-NENA can obviously decrease mechanical sensitivity and enhance mechanical properties of propellant.When the mass fraction of Bu-NENA is 19.1%,the mechanical properties of the propellant(code B3)are better.By contract with the blank group(NG based double base propellant,B0),the elongation under-40℃was promoted by 114%from 3.5%to 7.57%.Friction sensitivity was decreased by 95.7%from 46%to 2%,meanwhile,H_(50) was increased by 95.3%from 17.2cm to 33.6cm.The study of dynamic mechanical properties shows that Bu-NENA has better plasticizing effect on nitrocellulose(NC).Theβtransition temperature of B3 propellant decreases from-33.8℃of B0 to-37.8℃,and the toughness increases.The Bu-NENA based propellant exhibited an excellent low temperature mechanical property and low sensitivity which has certain application prospect in short range tactical weapon.

关 键 词：物理化学 N-丁基硝氧乙基硝胺 Bu-NENA 改性双基推进剂 高固含量 含能增塑剂 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] V512[航空宇航科学与技术—航空宇航推进理论与工程]