纤维素甘油醚硝酸酯在改性双基推进剂中的应用研究

Study on the application of NGEC in modified double base propellant

为了改善改性双基推进剂的力学性能,并提高推进剂的能量,用纤维素甘油醚硝酸酯(NGEC)替代硝化纤维素,采用吸收-压延法制备推进剂样品并进行了研究。对NGEC的基本理化性能进行了测试;采用靶线法测试了推进剂的燃速,并计算了压力指数,发现随着NGEC的加入,推进剂燃速与原配方样品均有所增加;高低温力学性能实验结果显示,含NGEC配方样品抗拉强度及延伸率均有不同程度的改善,尤其在高能高固推进剂配方中,低温条件下抗拉强度增幅达到43.2%,延伸率增幅达66.7%,充分证明NGEC能够改善双基推进剂低温脆的缺点;爆热测试结果显示NGEC的加入能够小幅提高爆热。

In order to improve the mechanical property of the modified double-base propellant and improved the energy of the propellant,cellulose glyceryl ether nitrate(NGEC)was used instead of nitrocellulose,and propellant samples were prepared by an absorption-extrusion method.The basic physical and chemical properties of NGEC were tested.The burning rate of the propellant was measured by the target line method,and the pressure index was calculated.It was found that with the addition of NGEC,the burning rate of each formula propellant increased.The results of high and low-temperature mechanical properties test shown that the tensile strength and elongation of NGECcontaining formulation were improved,especially in the high-energy and high-solid propellant formulation,the tensile strength increased by 43.2%under low-temperature condition,and the elongation rate increases by 66.7%.It fully proved that NGEC can improve the shortcoming of low-temperature brittleness of double-base propellant.The results of the thermal test showed that the addition of NGEC could slightly increase the explosive heat.