Small-Scale Testing of High Bulk Cubical and Spherical Nitroguanidine for Comparative Evaluation
Abstract
Two types of nitroguanidine (NQ), high bulk cubical (HBCNQ) and spherical (SNQ), were tested neat and as melt cast formulations with TNT and with RDX. The objective was to characterize both types of NQ with respect to thermal stability, shock sensitivity and performance. Parameters investigated were thermal stability, critical diameter, detonation velocity and pressure, shock sensitivity, and bullet impact. DSC thermograms from neat HBCNQ and SNQ suggest the former is less stable than the latter. This conclusion is reflected in the apparent activation energies, where that for HBCNQ is about 10 Kcal/mole less than that for SNQ. It is supported by DSC and slow cookoff data from both melt cast formulations. Critical diameters were determined and insight gained into the relationship of charge diameter with that diameter above which the NQ detonation velocity approaches ideal. Shock sensitivities and detonation pressures were obtained. The overall results suggest that ideal performance can be achieved more readily from a formulation with SNQ than with HBCNQ.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1991
- Accession Number
- ADA236509
Entities
People
- Pamela G. Summers
- Paul R. Schomber
- Robert L. Mckenney Jr.
- Steven D. Whitney