The sensitivity of nitroglycerin to impact

Levine, Donald; Boyars, Carl

doi:10.1016/0010-2180(65)90059-3

Cited by 8 publications

(2 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed, the viscosity of NG (35.5 mPa s at 20 °C [2]) facilitates the entrapment of gaseous NG minute bubbles, which strongly sensitize this explosive to impact [3]. According to Levine and Boyars the sensitivity to impact of NG is only 0.2 J [4]. The desensitization of NG is an old problem which was resolved by Nobel with the discovery of dynamites [5].…”

Section: Introductionmentioning

confidence: 99%

Nitroglycerin stabilisation in a polyester matrix synthesized by the polymerization of an epoxidized vegetable oil

Schwartz,

Comet,

Lemiègre

et al. 2023

Propellants Explo Pyrotec

View full text Add to dashboard Cite

Nitroglycerin (NG) is a high explosive that is difficult to handle in its liquid form, where the entrapment of gaseous NG bubbles results in its high sensitivity to impact (<0.25 J). NG‐based materials are traditionally prepared by complex mixing processes where desensitisation is of major concern. Instead of using a mixing procedure here we demonstrate the successful synthesis of dynamite‐like materials by using a single step bottom‐up approach to form a polymeric host matrix (PM) for NG from a solution which contains the explosive and the matrix precursors. For this purpose, an epoxidized vegetable oil mixed with nitroglycerin (oil to NG mass ratio of 60/40) is polymerized at 100 °C for 30 h by using glutaric acid as crosslinking agent. No degradation of NG under these conditions is observed. The activation energy of NG desorption from the PM (51.9 kJ/mol) is of the same order of magnitude as the one reported in literature for a double‐base powder (81.9 kJ/mol). An accelerated NG desorption is observed as temperature increases. This can be attributed to a slow diffusion mechanism of the explosive from the volume to the surface of the material, where it evaporates. The ignition of NG/PM in air by an open flame leads to a self‐sustained combustion, in which a part of nitroglycerin decomposes in the polymer matrix. Conversely, NG/PM monolithic and granular loads are not ignited by the explosion of the primer in a 9 mm calibre casing. The shockwave released by a detonator on a small NG/PM cylindrical charge (≈1.5 g) does not detonate it, but only makes it deflagrate. Our results show that this novel single‐step synthesis of NG trapped in a polymeric matrix is a very effective approach for desensitizing it to any form of stress.

show abstract

Section: Introductionmentioning

confidence: 99%

Nitroglycerin stabilisation in a polyester matrix synthesized by the polymerization of an epoxidized vegetable oil

Schwartz,

Comet,

Lemiègre

et al. 2023

Propellants Explo Pyrotec

View full text Add to dashboard Cite

show abstract

“…Nitroglycerin is a liquid substance under ambient conditions, which has particularly high explosive strength and explosion heat [ 1 ]. Despite these interesting properties, nitroglycerin is dangerous to handle in liquid state owing to its particularly low sensitivity threshold to impact (∼0.2 J) [ 2 ]. The hazardous properties of nitroglycerin are related to its physical state.…”

Section: Introductionmentioning

confidence: 99%

Nitroglycerin trapping in melamine matrices

Schwartz,

Comet,

Lallemand

et al. 2023

Heliyon

View full text Add to dashboard Cite

On the Time‐Dependence of the Force in Tests of impact sensitivity

Wild¹

1976

Propellants Explo Pyrotec

View full text Add to dashboard Cite

In order to characterize the small fall‐hammer of BAM (Bundesanstalt fur Materialprüfung) its mechanical properties were determined. Using the theory of the forces between two colliding bodies expressions were derived to describe the tester which were validated by the experimental measurements. I t was found that forces of up to 21 kN were transmitted to the anvil (for 1 kg weight dropping through 0,s m) and that the impact times ranged from about 150 f i s for the small weights to about 500 f i s for the large weights. It was also found that in addition to the expected kinetic energy dependence of the forces on the anvil there was also a dependence on the actual weight used.

show abstract

The sensitivity of nitroglycerin to impact

Cited by 8 publications

References 3 publications

Nitroglycerin stabilisation in a polyester matrix synthesized by the polymerization of an epoxidized vegetable oil

Nitroglycerin stabilisation in a polyester matrix synthesized by the polymerization of an epoxidized vegetable oil

Nitroglycerin trapping in melamine matrices

On the Time‐Dependence of the Force in Tests of impact sensitivity

Contact Info

Product

Resources

About