包覆前后ACP对高燃速改性双基推进剂高/低压强段燃烧性能的影响

Effects of Fast-burning Energetic Compound ACP and Coated ACP on Combustion Properties of High Burning Rate CMDB

为改善含快燃物ACP(一种以二价铜胺络离子为阳离子的高氯酸盐)高燃速改性双基推进剂的燃烧性能,利用液相沉积法制得聚合物包覆ACP。采用热重分析研究了ACP及包覆ACP的热分解性能;以ACP及包覆ACP作为添加剂,对改性双基推进剂(CMDB)在低压段(3～9MPa)和高压段(11～20.5MPa)燃烧性能进行了对比实验研究。结果表明:ACP及包覆ACP热分解过程均可分为四个阶段,其总失重分别为90.70%和76.22%;在CMDB推进剂中添加ACP及包覆ACP均可提高推进剂的燃速,高压段的燃速压力指数降低,低压段的燃速压力指数增大。含包覆ACP的推进剂在低压段和高压段的燃速压力指数要比纯ACP的低0.1左右。

For better combustion performance of high burning rate composite modified double base（CMDB） propellant with ACP, a novel fast-burning energetic coordination compound of copper（ Ⅱ ） salt with one of triazole derivatives, ACP particles were coated with polyurethane adhesive. The thermal decomposition behaviors of ACP and coated ACP were studied by thermogravimetry （TG）, and their effects on combustion performance of CMDB propellant in the pressure region of 11 - 20.5 MPa （ high pressure range） and 3 -9 MPa （low pressure range） were comparatively studied. Experimental results show that the thermal decomposition process of ACP or coated ACP includes four phases, and total loss of weight after decomposition are 90.70% and 76.22% , respectively. ACP and coated ACP are effective to enhance burning rates under low and high pressure and have about the same increments, and led to burning rate exponents enhancement under low pressure but reduction under high pressure. The propellants containing coated ACP show about 0.1 decrease in burning rate pressure exponent under high and low pressure in comparison with that of containing uncoated ACP with the same content in propellant. The experimental results indicate that the coating agent on the surface of ACP particles plays an important role in the thermal decomposition behaviors of ACP and affects combustion properties of propellants.