Nitroglycerin

McNiff, Edward F.; Yap, Peter S.K.; Fung, Ho‐Leung

doi:10.1016/s0099-5428(08)60152-5

Cited by 6 publications

(2 citation statements)

References 61 publications

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“…Despite these remarkable properties, the use of NG has been limited by its liquid form under STP conditions that makes its handling difficult and hazardous. 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].…”

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

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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.

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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

“…The hazardous properties of nitroglycerin are related to its physical state. First, nitroglycerin is a viscous liquid [ 3 ] which traps the minute bubbles formed by its evaporation. The heat released by the adiabatic compression of these bubbles by an impact results in hot spots which easily activate the reaction of the explosive [ 4 ].…”

Section: Introductionmentioning

confidence: 99%