【摘要】 为研究TKX-50对GAP基高能固体推进剂性能的影响,采用DSC-TG、50℃恒温贮存、摩擦感度、撞击感度、静电感度等方法研究了TKX-50与GAP基高能固体推进剂组分间安全性和相容性,并制备成TKX-50/GAP基高能固体推进剂药块,研究其密度、力学性能、安全性能、燃烧性能等,采用小型标准发动机研究其能量性能;通过DSC测试多种升温速率下的热分解性能,并使用Ozawa模型计算得到TKX-50的热分解活化能。结果表明,TKX-50与GAP黏合剂、AP、Al等相容性良好;TKX-50的热分解活化能为143.57kJ/mol;随着TKX-50含量的增加,25℃时TKX-50/GAP基高能固体推进剂的摩擦感度从100%降至44%,撞击感度从8.1J升至43.3J,静电感度变化不大,为16.0～42.0mJ;随着TKX-50含量的增加,25℃时TKX-50/GAP基高能固体推进剂的最大应力从0.65MPa降至0.35MPa,最大伸长率从25.5%升至34.33%,断裂伸长率从29.9%升至37.5%,模量从1.59MPa降至0.48MPa;低压段(3～9MPa)和高压段(12～25MPa)的燃速压强指数均呈现上升趋势,7MPa下静态燃速为17.2～18.0mm/s,低压段燃速压强指数为0.7～0.8,高压段燃速压强指数相对较高,最高达0.98。在6.86MPa下,动态燃速为21.07mm/s, BSFΦ165发动机实测比冲为256.7s。更多还原

【Abstract】 To study the effects of TKX-50 on the properties of GAP-based high-energy solid propellant, the safety and compatibility between TKX-50 and components from the GAP-based high-energy solid propellant were studied by using DSC-TG, constant temperature storage at 50℃, friction sensitivity, impact sensitivity and electrostatic sensitivity. TKX-50/GAP-based high-energy solid propellant blocks were prepared for studying their densities, mechanical properties, safety and combustion properties. The energy performance of TKX-50/GAP-based propellant was studied by using small standard engines. The thermal decomposition behavior of the propellant was tested by DSC at various heating rates, and the activation energy of TKX-50 was calculated using the Ozawa model. The results show that TKX-50 is well compatible with GAP binder, AP and Al, etc. The activation energy of TKX-50 thermal decomposition is 143.57 kJ/mol. With the increase of TKX-50 content, the friction sensitivity of TKX-50/GAP-based propellant at 25℃ decreases from 100% to 44%, the impact sensitivity increases from 8.1 J to 43.3 J, and the electrostatic sensitivity does not change much, ranging from 16.0 to 42.0 mJ. With the increase of TKX-50 content, the maximum stress of TKX-50/GAP-based propellant at 25℃ decreases from 0.65 MPa to 0.35 MPa, the maximum elongation increases from 25.5% to 34.33%, the elongation at break increases from 29.9% to 37.5%, and the modulus decreases from 1.59 MPa to 0.48 MPa. The pressure exponents in the low-pressure section(3-9 MPa) and high-pressure section(12-25 MPa) show an increasing trend, and the static burning rate at 7 MPa is 17.2-18.0 mm/s, and the pressure exponent in the low-pressure section was in the range of 0.7—0.8,higher than that of the low-pressure,which can reach0.98.At 6.86 MPa,the dynamic burning rate is 21.07 mm/s,and the measured specific impulse of the propellants on the BSFΦ165 engine is 256.7 s.更多还原