Fremstilling og testing av PBXN-110

Two charges of HMX crystals with crystal size distribution as class 2 and 3 have been used in production of PBXN-110 with 87.2 wt. % HMX. The purpose of the production of PBXN-110 was to study if used crystals could give improved properties with regard to shock sensitivity. In Intermediate Scale Gap test the study composition gave a shock sensitivity of 38.5 kbar, a result in accordance with what we normally have achieved for PBXN-110. The obtained shock sensitivity of PBXN-110 indicate the used crystals sats 482/06 and sats 835/09 have no RS (reduced Sensitivity) properties, even though the obtained shock sensitivity was in the lower range of what is reported in the literature for shock sensitivity of PBXN-110. Curing for 4 days at 50o C gave a composition that satisfies the requirement for Shore A15s hardness of 20 since our average result was 34.6. The average critical diameter determined by initiating a cone of the explosive was found to be 3.8+0.2 mm. Detonation velocity has been measured to 8233m/s, and the detonation pressure measured by use of Plate Dent test to 242 kbars. The last two results are in accordance with Cheetah calculated values.