Thermal Decomposition of Energetic Materials 86.Cryogel Synthesis of Nanocrystalline CL-20 Coated with Cured Nitrocellulose

摘要

An unusual energetic composite,in which spherical nano-dimensional particles of CL-20 were uniformaly coated with HDI-cross-linked nitrocellulose,was synthesized by the sol-gel to cryogel method.Up to 90% solid loading was achieved.The particle size of CL-20 was determined ot be in the range of 20-200 nm by transmission electron microscopy,atomic force microscopy,and X-ray powder diffraction.The decomposition characteristics of the composite were investigated by DSC and T-jump/FTIR spectroscopy.The decomposition properties were controlled mostly by nitrocellulose until the percentage of CL-20 was well above 50%.The drop weight impact sensitivity of the cryogels was essentially independent of the composition.