醋酸丁酸纤维素对发射药涂覆层低温力学性能的影响
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摘要
为提高发射药涂覆层在低温环境下的力学强度,选择醋酸丁酸纤维素(CAB)和TiO_2粉末作为钝感剂,分别按照不同比例与三胍-15药片(主要组分为NC和NG)混合,用醇酮溶液(乙醇与丙酮体积比为1∶1)配制成涂覆液,进而制成拉伸样品进行拉伸试验,来比较涂覆层与发射药的黏结强度,并通过三维视频观察分析涂覆位置断裂情况;采用端面局部阻燃(阻燃位置为发射药的端面,且发射药内孔保持通气状态)的方法,利用喷涂工艺制备得到涂覆发射药,并进行了密闭爆发器试验,比较分析了不同钝感剂配方涂覆的发射药在不同温度下的L-B曲线。结果表明,在-40℃时,含有TiO_2的涂覆层力学强度较差,在TiO2质量分数为35%时达到相对最大值7.871MPa;而含有CAB的涂覆层黏结强度有所提高,在CAB质量分数为35%时达到9.970MPa。采用CAB作为钝感剂的涂覆发射药在-40℃下的燃烧渐增性相比采用TiO_2时提高了9.278%。
To improve the mechanical properties of coating layer of gun propellant at low temperature environment,selecting cellulose acetate butyrate(CAB)and TiO_2 powder as desensitized agents,cellulose acetate butyrate(CAB)and TiO_2 powder were mixed with triguannidine-15 absorption propellant tablets(main component is nitrocellulose and nitroglycerin)according to different proportion respectively and the coating liquid was prepared by ethanol-acetone solution(the volume ratio of ethanol and acetone is 1∶1).Then,tensile samples were made for the tensile experiments to compare the bonding strength of coating layer and propellant,and the fracture situation of coated position was observed and analyzed by 3 Dvideo.Using the local flame retardant(flame retardant position is the end face of propellant and propellant hole maintains ventilation state)method of end face,the coated gun propellant was prepared by spraying.The closed bomb experiments of propellant grains were performed.The L-Bcurves at different temperatures of coated propellants coated by different desensitized agent formulation were compared and analyzed.The results show that at-40℃,the mechanical strength of coated propellants with TiO_2 is poorer.When the mass fraction of TiO_2 reaches 35%,the pressure reaches a relative maximum of 7.871 MPa,while the adhesive strength of coating layers with CAB increases.When the mass fraction of CAB is 35%,the adhesive strength of coating layers reaches 9.970 MPa.The combustion progressity of the coated propellant with CAB as desensitized agent at-40℃increases by 9.278% when compared with the use of TiO_2.
To improve the mechanical properties of coating layer of gun propellant at low temperature environment,selecting cellulose acetate butyrate(CAB)and TiO_2 powder as desensitized agents,cellulose acetate butyrate(CAB)and TiO_2 powder were mixed with triguannidine-15 absorption propellant tablets(main component is nitrocellulose and nitroglycerin)according to different proportion respectively and the coating liquid was prepared by ethanol-acetone solution(the volume ratio of ethanol and acetone is 1∶1).Then,tensile samples were made for the tensile experiments to compare the bonding strength of coating layer and propellant,and the fracture situation of coated position was observed and analyzed by 3 Dvideo.Using the local flame retardant(flame retardant position is the end face of propellant and propellant hole maintains ventilation state)method of end face,the coated gun propellant was prepared by spraying.The closed bomb experiments of propellant grains were performed.The L-Bcurves at different temperatures of coated propellants coated by different desensitized agent formulation were compared and analyzed.The results show that at-40℃,the mechanical strength of coated propellants with TiO_2 is poorer.When the mass fraction of TiO_2 reaches 35%,the pressure reaches a relative maximum of 7.871 MPa,while the adhesive strength of coating layers with CAB increases.When the mass fraction of CAB is 35%,the adhesive strength of coating layers reaches 9.970 MPa.The combustion progressity of the coated propellant with CAB as desensitized agent at-40℃increases by 9.278% when compared with the use of TiO_2.
引文
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[2]Xiao Zheng-gang,Ying San-jiu,Xu Fu-ming.Deconsolidation and combustion performance of thermally consolidated propellants deterred by multi-layers coating[J].Defence Technology,2014,10(2):101-105.
[3]Isert S,Lane C D,Gunduz I E,et al.Tailoring burning rates using reactive wires in composite solid rocket propellants[J].Proceedings of the Combustion Institute,2017,36(2):2283-2290.
[4]萧忠良,贺增弟,刘幼平,等.变燃速发射药的原理与实现方法[J].火炸药学报,2005,28(1):25-27.XIAO Zhong-liang,HE Zeng-di,LIU You-ping,et al.Principle and realizable approach of variable burning rate propellant[J].Chinese Journal of Explosives&Propellants(Huozhayao Xuebao),2005,28(1):25-27.
[5]姚月娟,刘少武,王锋,等.NG含量对改性单基药燃烧渐增性的影响[J].含能材料,2013,21(3):343-346.YAO Yue-juan,LIU Shao-wu,WANG Feng,et al.Effect of nitroglycerine content on combustion progressivity of modified single base propellant[J].Chinese Journal of Energetic Materials,2013,21(3):343-346.
[6]罗运军,王泽山.包覆火药装药技术的理论分析[J].火炸药学报(火化工分册),1995,5(1):23-27.LUO Yun-jun,WANG Ze-shan.Theoretical analysis on the technology of coated propellant charge[J].Chinese Journal of Explosives&Propellants(Huozhayao Xuebao),1995,5(1):23-27.
[7]芮久后,黄辉,王泽山.硝胺包覆火药工艺及弹道性能研究[J].含能材料,2004,12(s1):147-149.RUI Jiu-hou,HUANG Hui,WANG Ze-shan.Study on the coating technology and ballistic performance of the coated nitramine propellant[J].Chinese Journal of Energetic Materials,2004,12(s1):147-149.
[8]黄洪勇,王泽山.两种工艺制造的低温感包覆火药性能的比较研究[J].火炸药学报,2000,23(1):6-9.HUANG Hong-yong,WANG Ze-shan.Comparison study of two technology of making coated propellant with low temperature sensitivity[J].Chinese Journal of Explosives&Propellants(Huozhayao Xuebao),2000,23(1):6-9.
[9]罗运军,刘玉海,何卫东,等.不同包覆方式包覆火药的燃烧性能[J].弹道学报,1995,7(2):22-26.LUO Yun-jun,LIU Yu-hai,HE Wei-dong,et al.Coated propellant combustion properties of different coating ways[J].Journal of Ballistics,1995,7(2):22-26.
[10]罗运军,应三九,王泽山,等.包覆层性质对包覆火药破孔率影响的研究[J].火炸药学报(火化工分册),1995,10(2):1-4.LUO Yun-jun,YING San-jiu,WANG Ze-shan,et al.The effects of coating layer properties to perforation rate of coated propellant[J].Chinese Journal of Explosives&Propellants(Huozhayao Xuebao),1995,10(2):1-4.
[11]Dong Bin-bin,Guo Xiao-de,Yang Xue-qin,et al.Research on application of low temperature plasma technology in the field of solid propellant coating[J].Journal of Solid Rocket Technology,2015,38(3):387-391.
[12]Zheng Qi-long,Tian Shu-chun,Zhou Wei-liang,et al.Energy and combustion properties of the GAP-base polyurethane coated single-base propellants[J].Chinese Journal of Energetic Materials,2016,24(8):787-792.
[13]武海顺,王泽山.三基包覆药中二氧化钛迁移行为的研究[J].火炸药学报(火化工分册),1994,5(1):1-5.WU Hai-shun,WANG Ze-shan.Study on migration behavior of titanium dioxide in three-based coated propellant[J].Chinese Journal of Explosives&Propellants(Huozhayao Xuebao),1994,5(1):1-5.
[14]堵平,何卫东,王泽山.二氧化钛在发射药燃烧中的阻燃作用研究[J].含能材料,2005,13(2):99-102.DU Ping,HE Wei-dong,WANG Ze-shan.Study ontitanium dioxide retardation of flaming in the propellant[J].Chinese Journal of Energetic Materials,2005,13(2):99-102.
[15]Wang Yan-hua,Liu Xi-lu.The performance study about the boronitriding layer in the low temperature.[C]∥International Conference on Digital Manufacturing and Automation(ICDMA).Zhangjiajie:IEEE,2011:1309-1312.
[16]Ratchev P,Vandevelde B,Verlinden B,et al.Brittle to ductile fracture transition in bulk Pb-free solders[J].IEEE Transactions on Components&Packaging Technologies,2007,30(3):416-423.
[17]Wiese S,Kraemer F,Meier R,et al.Mechanical problems of manufacturing processes for photovoltaic modules.[C]∥18th Microelectronics and Packaging Conference(EMPC).Brighton:IMAPS,2011.
[18]王琼林,赵小锋,刘少武,等.一种基于密闭爆发器试验的发射药燃烧渐增性定量评价方法[J].火炸药学报,2009,32(3):71-74.WANG Qiong-lin,ZHAO Xiao-feng,LIU Shao-wu,et al.A quantitative assessment method of gun propellant combustion progressivity based on closed bomb test[J].Chinese Journal of Explosives&Propellants(Huozhayao Xuebao),2009,32(3):71-74.
[19]王泽山,史先扬.低温度感度发射装药[M].北京:国防工业出版社,2006.
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