纤维素甘油醚 酸酯改善 射 低温内弹 性能的研

In order to solve the problem of high chamber pressure of oblate spherical propellant containing high-energy solids at low-temperature, and to avoid the reduction of propellant energy, spherical double-base propellants with nitrate glycerol ether cellulose(NGEC)were prepared. The effects of NGEC on the shape, combustion performance, interior ballistic performance and sensitivity of oblate spherical propellant were investigated. The results showed that the uniformity of shape and size of spherical propellant granules were good after adding NGEC. The combustion of propellants presented progressive burning, and the impact sensitivity decreased by 30%. The interior ballistic performance was improved. At +15, +50 and -40℃, the average maximum bore pressure decreased by 10%, 8% and 15%. The low-temperature(-40℃)mechanical properties were improved, when the fragmentation rate was kept at 50%, and the high impact and impact resistance strength increased by 10.52% and 17.32%. NGEC is expected to be applied to spherical double-base spherical propellants.