Powerful New Explosive Could Replace Today's State-Of-The-Art Military Explosive
Adam J. Matzger and colleagues explain that a technique for engineering medicines and other materials, termed cocrystallization, is attracting attention as a way to make improved explosives, rocket propellants and fireworks. Most solid materials consist of crystals — with atoms and molecules arranged in a specific pattern that repeats itself time and again. Cocrystallization involves combining two materials into a new crystal architecture with the goal of producing an improved material.
They describe cocrystallization of the military’s standard explosive, HMX, with a powerful explosive called CL-20, which the authors say is too prone to accidental detonation for military use. Mixing two parts CL-20 with one part HMX, however, produced a new explosive with a blast wave that would travel almost 225 miles per hour faster than that of the purest form of HMX, meaning a much more powerful blast. The new explosive, however, was as stable and resistant to accidental detonation as HMX. They suggest that it has the potential to replace HMX as the new state-of-the art military
HMX, also called octogen, is a powerful and relatively insensitive nitroamine high explosive, chemically related to RDX. Like RDX, the compound’s name is the subject of much speculation, having been variously listed as High Melting eXplosive, Her Majesty’s eXplosive, High-velocity Military eXplosive, or High-Molecular-weight rdX.
Credit: Wikipedia
The molecular structure of HMX consists of an eight-membered ring of alternating carbon and nitrogen atoms, with a nitro group attached to each nitrogen atom. Because of its high molecular weight, it is one of the most potent chemical explosives manufactured, although a number of newer ones, including HNIW and ONC, are more powerful.
During World War II, under the code name Aunt Jemima, HMX was mixed with flour and used by Chinese guerrillas to disrupt the Japanese invasion and occupation of China. The mixture could easily pass for regular flour, thereby passing checkpoints without detection. It could even be cooked into pancakes without exploding and eaten without poisoning anyone. Uneaten pancakes or unused dough could still be used later for its original explosive purposes. In China during WWII, 15 tons of the “Aunt Jemima” HMX mixture was used. None was ever “discovered” by the Japanese.
HMX is used in melt-castable explosives when mixed with TNT, which as a class are referred to as “octols”. Additionally, polymer-bonded explosive compositions containing HMX are used in the manufacture of missile warheads and armor-piercing shaped charges.
HMX is also used in the process of perforating the steel casing in oil and gas wells. The HMX is built into a shaped charge that is detonated within the wellbore to punch a hole through the steel casing and surrounding cement out into the hydrocarbon bearing formations. The pathway that is created allows formation fluids to flow into the wellbore and onward to the surface.
Contacts and sources:
Michael Bernstein
American Chemical Society
2012-09-05 08:51:55
Source: http://nanopatentsandinnovations.blogspot.com/2012/09/powerful-new-explosive-could-replace.html
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