Preparation and Properties of HMX/Nitrocellulose Nanocomposites

摘要

A nanocomposite, which contained HMX and nitrocellulose (NC), was prepared successfully by spray drying. The nanocomposites were 1 to 5 μm spheres, which were composed of 50-nm-sized particles. The HMX sample without NC (HMX/1) was obtained by the same spray drying process also. The crystal types of HMX/1, HMX/NC, and raw HMX were kept consistent, but the diffraction peaks of the HMX/NC nanocomposites were much wider and weaker. Adding NC had an effect on the diffraction of the x ray. The activation energy of HMX/NC was lower than that of raw HMX but higher than that of HMX/1. The impact sensitivities of HMX/1 and HMX/NC were lower than that of the raw HMX because of a higher drop height. The burning rate of HMX/NC-nanocomposites-based propellants was higher man that of HMX/1- and raw-HMX-based propellants. These combined properties suggest that the HMX/NC nanocomposite is an insensitive and spherical explosive with great potential in a solid propellant.