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采用差示扫描量热仪(DSC)研究了铜铬类燃速催化剂(亚铬酸铜CC01和铜铬复合氧化物CC02)对端羟基聚醚(HTPE)低易损推进剂中的高氯酸铵(AP)、改性硝酸铵(AN)、HTPE黏合剂体系热分解性能的影响。结果表明,加入少量的CC01和CC02均使AP高温分解峰温明显降低了16和29.7℃,AP高温分解活化能依次降低了16.65和22.59kJ/mol,均可提高AP的高温分解反应速率。CC01和CC02均使AN的热分解峰向低温方向依次前移了52.3和53.6℃,均降低了AN的分解活化能,使AN的热分解反应速率提高了3~4倍。CC01和CC02对HTPE黏合剂体系的热分解影响较小。在AP/AN/Al/HTPE低易损推进剂中,分别添加质量分数0.5%的CC01和CC02可显著提高HTPE低易损推进剂在3~15MPa下的燃速,可使推进剂在7MPa下的燃速分别提高34.1%和43.4%,但CC01和CC02对HTPE低易损推进剂在3~9MPa下的压强指数几乎无影响,而9~15MPa下的压强指数有所降低。
The perchloric acid content of copper-chromium-based combustion catalysts (copper chromite CC01 and copper-chromium complex oxide CC02) and low breakdown propellants of terminal hydroxyl polyether (HTPE) were studied by differential scanning calorimeter (DSC) (AP), modified ammonium nitrate (AN), HTPE binder system thermal decomposition performance. The results showed that adding a small amount of CC01 and CC02 both decreased the peak temperature of pyrolysis of AP significantly by 16 and 29.7 ℃, respectively, and the activation energies of pyrolysis of AP decreased by 16.65 and 22.59kJ / mol, respectively, both of which increased the pyrolysis reaction rate of AP. Both CC01 and CC02 advanced the thermal decomposition peak of AN to 52.3 and 53.6 ℃ in order of low temperature, both decreased the decomposition activation energy of AN, and increased the thermal decomposition reaction rate of AN by 3 to 4 times. CC01 and CC02 have little effect on the thermal decomposition of HTPE binder system. In the AP / AN / Al / HTPE low vulnerability propellant, adding CC01 and CC02 with mass fraction of 0.5% can significantly improve the burning rate of HTPE low vulnerability propellant at 3 ~ 15MPa, The ignition speed of CC01 and CC02 had little effect on the pressure index of HTPE low vulnerability propellant at 3 ~ 9MPa, while the pressure index at 9 ~ 15MPa decreased.