Surface Coating of Cyclotetramethylenetetranitramine (HMX) Particles and Its Property Investigation

To improve the safety of cyclotetramethylenetetranitramine (HMX) particles, polymer thermoplastic polyurethane elastomer (TPU) and nitrocellulose (NC) were introduced to coat HMX powder by water-solution suspension method internal solution method, respectively. Scanning electron microscope (SEM) X-ray photo-electron spectrometry (XPS) employed characterize samples role NC TPU in coating processes discussed. The impact sensitivity, friction thermal decomposition coated particles investigated, compared unprocessed ones. results indicate that both can wetting ability materials on surface reinforce connection between materials. sensitivity decrease obviously after they have been coated; drop height (H50) is increased from 35.24 cm 50.08 cm, probability reduced 93.2 % 58.3%. activation energy (Ea) self-ignition temperature increase 10.46 KJ·mol-1 1.8,