Burning characteristics of high density foamed GAP/CL-20 propellants  

作　　者：Man-man Li Rui Hu Ming-hui Xu Qiong-lin Wang Wei-tao Yang 

机构地区：[1]Xi'an Modern Chemistry Research Institute,Xi'an,710065,PR China [2]School of Physics,Xi'an Jiaotong University,Xi'an,710049,PR China

出　　处：《Defence Technology（防务技术）》2022年第10期1914-1921,共8页Defence Technology

摘　　要：The monolithic foamed propellants with high densities were prepared by casting and two-step foaming processes.Glycidyl azide polymer(GAP)and isocyanate were used as the binder system and 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane(HNIW,CL-20)was employed as the energetic component.The newly designed formulation containing 60%CL-20 produced a force constant of 1077 J/g and low flame temperature of 2817 K.Two foamed propellants with densities of 1.32 g/cm^(3)and 1.53 g/cm^(3)were fabricated by a confined foaming process and examined by closed bomb tests.The results revealed that porosity significantly affects burning performance.A size effect on combustion behaviors was observed for the foamed propellant with 5.56%porosity,and a double-hump progressive dynamic vivacity curve was obtained.At last,the 30 mm gun test was carried out to demonstrate the interior ballistic performance,and the muzzle velocity increased by 120 m/s at the same maximum chamber pressure when monolithic propellant was added in the charge.

关 键 词：Monolithic foamed propellants Two-step foaming process Casting process GAP/CL-20 

分 类 号：TJ301[兵器科学与技术—火炮、自动武器与弹药工程] TQ560.1[化学工程—炸药化工]