溶剂抽取工艺制备改性单基发射药的燃烧性能

为了进一步改善改性单基药的燃烧性能,对弧厚为0.55 mm的单基药单5/7进行增能、钝感处理,制备了1#、2#改性单基发射药样品,2#样品则在1#样品增能与钝感的工艺基础上增加了溶剂抽取工艺。采用扫描电镜分析了1#、2#样品的表面形貌,用标准容器法测试了其堆积密度,通过密闭爆发器研究了1#、2#样品的定容燃烧特性。结果表明,经过溶剂抽取工艺制备的2#改性单基发射药样品其表面更加致密,堆积密度从0.888 g.cm-3提高到0.920 g.cm-3;其初始燃烧稳定,燃烧分裂时间点为7.0 ms,滞后于1#样品(6.0 ms);燃烧结束时间为8.0 ms,迟于1#样品(7.2 ms),燃烧渐增性有所提高。

Combustion Performance of Modified Single Base Gun Propellant Prepared by Solvent Extraction Process

In order to further improve the combustion performance of the modified single base gun propellant,the modified single base gun propellants 1^# and 2^# were prepared via the energy-increased and desensitized process to the 5/7 single base gun propellant with web of 0.55 mm. The solvent extraction process was adopted in the energy-increased and desensitized process of preparing the sample 2^#. The surface appearance was investigated by SEM. The bulk densities were determined by a standard container method. The combustion performances under constant volume were analyzed by a closed bomb test. The results show that the structure of propellant 2^# is solidish. The bulk density of propellant 2^# is increased from 0.888 g·cm^-3 to 0.920 g·cm^-3. The initial combustion of propellant 2^# is steady and the grain split point is delayed from 6.0 ms of propellant 1^#to 7.0 ms of propellant 2^#. The combustion end is delayed from 6.0 ms of propellant 1^# to 8.0 ms of propellant 2^#. The combustion progressivity of propellant 2^# is enhanced,revealing that propellant 2^# has an excellent combustion performance.