高强度、高燃速丁羟推进剂配方工艺研究

对高不挥发物质量分数、高强度、高燃速丁羟推进剂进行了配方研究。采用了HTPB(端羟基聚丁二烯)、TDI(甲苯二异氰酸酯)黏合剂体系及STR增强剂的固化网络,选用SX-1助剂以改善工艺性能,通过优化AP级配、调节混合工艺程序等方法,使推进剂具有不挥发物质量分数88%、密度1.82g/cm3、20℃抗拉强度σm3MPa、65℃抗拉强度σm≥2.3MPa,燃速35mm/s的良好性能,并具有药浆初始黏度低,工艺流动流平性好的特点。

Study on Formulation Process of Hydroxyl-terminated Polybutadiene Propellant With High Strength and High Burning Rate

The formulation of hydroxyl-terminated polybutadiene（HTPB） propellant with high mass fraction of non- volatile substance, high strength and high burning rate was investigated. The HTPB/TDI（toluene diisocyanate） binder system, STR reinforced curing network and assistant SX-1 were adopted to improve the processing property. The obtained propellant possesses excellent properties, such as mass fraction of non-volatile substance 88%, density 1.82 g/cm3, tensile strength σm 3 MPa at 20℃, tensile strength σm≥ 2.3 MPa at 65℃, and burning rate 35 mm/s by means of optimizing AP particle size distribution, modifying mixing process procedure and etc. Moreover, the propellant slurry exhibits low initial viscosity, and good process fluidity and self-leveling behavior.