梯形硝化纤维素制备及其在双基发射药中的应用(Ⅰ):相容性、热分解及感度OA
Preparation of Ladder-Like Nitrocellulose and its Application in Double-base Gun Propellants(Ⅰ):Compatibility,Thermal Decomposition and Sensitivity
为解决高能发射药因添加大量固体高能填充物导致的力学性能不足、感度高的问题,本研究以硝化纤维素为原料,异佛尔酮二异氰酸酯为偶联剂,聚乙二醇为柔性链段,通过两步接枝反应制备梯形硝化纤维素(LNC),并将其作为含能黏结剂部分取代硝化纤维素,采用半溶剂法制备梯形硝化纤维素基双基发射药,梯形硝化纤维素按照设计的反应路径形成了双链的分子结构.对所得的梯形硝化纤维素基双基发射药进行了相容性、热分解以及感度研究.结果表明,梯形硝化纤维素与硝化纤维素之间具有良好的相容性.制备得到的梯形硝化纤维素基双基发射药起始分解温度由190.20℃提升至200.89℃,热稳定性增强;特性落高值由15.4 cm提升至28.2 cm,撞击感度降低.
To address the issues of insufficient mechanical properties and high sensitivity in high-energy gun propellants caused by the addition of large amounts of solid high-energy fillers,by using nitrocellulose as the raw material,isophorone diisocyanate as the coupling agent,and polyethylene glycol as the flexible segment,the ladder-like nitrocellulose(LNC)was prepared via a two-step grafting reaction.LNC was then used as an energetic binder to partially replace nitrocellulose,and a semi-solvent meth-od was adopted to prepare LNC-based double-base gun propellants.LNC formed a double-stranded molecular structure accord-ing to the designed reaction pathway.The compatibility,thermal decomposition and sensitivity of LNC-based double-base gun propellants were investigated.Results show that there is good compatibility between LNC and nitrocellulose.The LNC-based double-base gun propellants exhibit enhanced thermal stability with the initial decomposition temperature increased from 190.20℃to 200.89℃.The impact sensitivity is reduced with the characteristic drop height value increased from 15.4 cm to 28.2 cm.
浦程凯;栾于;蒋梓洪;秦枭锋;肖正刚
南京理工大学 化学与化工学院,江苏 南京 210094南京理工大学 特种能源材料教育部重点实验室,江苏 南京 210094南京理工大学 化学与化工学院,江苏 南京 210094南京理工大学 特种能源材料教育部重点实验室,江苏 南京 210094南京理工大学 化学与化工学院,江苏 南京 210094
军事科技
LNC(梯形硝化纤维素)双基发射药低敏感接枝改性相容性
ladder-like nitrocellulosedouble-base gun propellantslow sensitivitygraft modificationcompatibility
《含能材料》 2026 (1)
92-99,8
国家自然科学基金(22475100)National Natural Science Foundation(No.22475100)
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