Conference Session A4 Paper 132 Disclaimer—This paper partially fulfills a writing requirement for first year (freshman) engineering students at the University of Pittsburgh Swanson School of Engineering. This paper is a student, not a professional, paper. This paper is based on publicly available information and may not provide complete analyses of all relevant data. If this paper is used for any purpose other than these authors’ partial fulfillment of a writing requirement for first year (freshman) engineering students at the University of Pittsburgh Swanson School of Engineering, the user does so at his or her own risk. INNOVATION IN EXPLOSIVES Brandon George, [email protected], Vidic 2:00, Aeneus Evans, [email protected], Sanchez 5:00 Abstract—Conventional explosives used by the military such as TNT are dangerous both on the battlefield and in storage. TNT is very sensitive to heat, vibration, and punctures. Unfortunately, there have been cases where the high sensitivity of TNT has led to unintentional explosions that have claimed the lives of soldiers. To reduce the risk of an unintentional explosion, and therefore unintended injury or death, insensitive munitions were developed. Insensitive munitions are those that can withstand a wide range of conditions that would otherwise cause a potential explosion in a traditional munition. These conditions include: shock from transportation or being pierced by a bullet; heat, such as a nearby fire; and nearby explosions. The ability of these types of munitions to withstand these conditions make them a much safer option, as they are designed to only explode when intended. The increase in safety of these munitions is a great benefit to the world, as it is easier to prevent accidental explosions, decreasing the risk of loss of life. For the purposes of this paper, we will focus on how insensitive munitions are an improvement in the military world, and more specifically how the insensitive munitions IMX-101 is a superior explosive to the traditional TNT. Key Words— IMX-101, TNT, Insensitive munitions, Safer explosives, TNT Replacement. WHAT IS TNT FIGURE 1 [12] Trinitrotoluene in its original, yellow powder form Trinitrotoluene (written as C6H2(NO2)3CH3) also commonly known as TNT, is a yellow-colored solid that is known for its high explosive potential. Scientifically known as 2,4,6-trinitrotoluene, TNT is one of the most commonly used explosive for military, industrial, and mining applications. The explosive yield of TNT is even used as the standard measure for other bombs and explosives. TNT was created by German chemist Julius Wilbrand who used it initially as a yellow dye. Its high explosive properties were not discovered for a long time because it was so difficult to find a way to make TNT detonate. When its explosive properties were first discovered, it was considered so insensitive that it was exempt from the United Kingdom's Explosive Act of 1975 and was not even considered an explosive [9]. HISTORY OF TNT Before the development of TNT, the explosives used were very unstable and were prone to spontaneous combustion. Compounds like black powder and nitroglycerine were highly explosive but, due to their low activation energies, required little to no stimulation to denotate. In fact, the very first shipment of the nitroglycerine compound exploded accidentally and killed fifteen people on University of Pittsburgh Swanson School of Engineering 1 Submission Date 3.31.2017 Aeneus Evans Brandon George board the ship. TNT, on the other hand, was proven to be stable in solid form and in liquid form, with the ability to be poured by manufacturers due to the melting point being lower than the point of combustion. TNT has a high detonation velocity at six thousand six hundred forty meters per second, and has an energy content of four and six tenths megajoules per kilogram, an energy-density figure which is still used as a frame of reference for modern bombs. An example of this is that nuclear bombs are given yields in megatons of TNT. [9] WHAT HAPPENS WHEN TNT EXPLODES FIGURE 3 [9] Chemical Formula of the Decomposition of TNT on detonation TNT is prone to reacting with components produced by sunlight and is both thermodynamically and kinetically capable of reacting with other components of environmental systems, such as photons, hydrogen sulfide, or an iron cation. An important process of exciting energetic compounds is photolysis, which is a chemical reaction that breaks down a chemical compound with photons. This alteration occurs during the absorption of direct sunlight with a transfer of energy. Evidence of photolysis during the detonation of TNT is evident in the color change from yellow to pink in the wastewaters. [9] The reaction itself is exothermic, or releases energy into the surroundings, however, the activation energy to start the reaction is relatively high in its gaseous state compared to its condensed solid or liquid states [9]. Due to the production of carbon, TNT explosions can be described as having a "sooty appearance" to then [9]. In addition to this, the carbon in TNT itself causes explosions with more energy per kilogram than the original TNT explosion if added to compounds rich with oxygen. If some of this carbon reacts initially with the oxygen in the atmosphere, the heat of the combustion of TNT is fourteen and one-half megajoules per kilogram. In comparison, "gunpower contains three megajoules per kilogram, dynamite contains seven and onehalf megajoules per kilogram, and gasoline contains fortyseven and two tenths megajoules per kilogram."[9] FIGURE 2 [13] Three-step process illustrating the production of TNT For the preparation of TNT, first toluene is nitrated with both sulfuric acid and nitric acid to create MNT (mononitrotolene). MNT is then put aside and made into DNT (dinitrotoluene) by renitration. Finally, DNT is nitrated into TNT using a mixture containing nitric acid and oleum. The TNT is then stabilized using an aqueous solution of sodium sulfite in a process called sulfitation to remove all other unwanted reaction products and less stable isomers. [9] After TNT was found out to be a very useful explosive, both Europe and America made use of it in World War I. However, TNT was found to have two main problems: extreme insensitivity in its cast form and a difficulty to cast without an air hole on it. The first problem was initially solved by drilling a small hole into the shell and filling it with tetryl (trinitrophenylmethylnitramine) and the second problem was solved by mixing sixty percent of the TNT with forty percent of a chemical called TNX (trinitroxylene). Mixing the two chemicals together allows the cast to be detonated with small tetryl booster. [11] PROBLEMS WITH TNT TNT is known to be an effective explosive and was thought to be useful due to the insensitivity of the chemical, it is now known to have many drawbacks. TNT is very poisonous and causes skin problems, like irritation or discoloring [9]. Exposure to TNT for a prolonged period of time is known to cause anemia, abnormal liver functions, and other harmful immune system effects that have been known to be shared by animals who also ingested or inhaled the chemical [9]. Military testing grounds have also been affected negatively by TNT [9]. Most importantly, storing TNT in areas of high temperature can cause exudation of the impurities, leading to cracks and fire channels which increase shock sensitivity and the risk of accidental detonations [9]. We will use this information to transition into examples of how the drawbacks of TNT caused issues. When it comes to manufacturing the actual compound, it must be precise work, 2 Aeneus Evans Brandon George otherwise impurities can form, leading to faults and cracks in the TNT itself, increasing the likelihood of accidental detonation in the laboratory where the compound was being manufactured or when in military or industrial use as TNT. The toxicity of TNT is not limited to effects on the body of those who use it, but also spreads to the soil, atmosphere, and biosphere. The residue of TNT can pollute water and soil from manufacturing, storing the TNT, and the use of it. "The USEPA maintains that the level of TNT in soil should not exceed 17.2 grams per kilogram of soil and one onehundredth milligrams per liter of water. The substance is also toxic to aquatic organisms and may have negative, long term effects on the aquatic environment. "Dissolution is the measure of the rate that solid TNT in contact with water can be dissolved."[9] Since the aqueous solubility of TNT is low, dissolution of solid particles is continuously released into the environment over an extended period of time. In addition to this, TNT is moderately soluble in water, which means it can migrate and travel through the soil under the surface and cause contamination in the water. "Absorption is a measure of the distribution between soluble and sediment absorbed contaminates."[9] TNT and its products after transformation have been known to absorb into surface soils and sediments, where they are then able to be stored or transformed again. This movement or contamination of organic compounds through soil and sediment is a function related to their ability to associate with the water (mobile phase) and the soil (stationary phase). FIGURE4 [10] Picture of the damage done to the base in Kuwait As illustrated in the above picture, TNT can cause immense amounts of damage both on and off the battlefield. The radius of the damage is very large and helps put into perspective what accidental explosions can produce. This was not the only case during the Gulf War, as TNT was the culprit of more damage done to our own resources throughout the war. Most of the disabling damage done to vehicles was because the vehicles were carrying sensitive munitions that would often detonate because of the unwanted stimuli. [10] For example, whenever trucks carrying TNT came under attack or drove over a mine, the TNT was at a very high risk of exploding, and often did. The US Navy experienced an uncontrolled explosion aboard one of their ships in 1967. On the USS Forrestal, a ZUNI rocket was accidentally fired from an aircraft being prepared for launch. It was launched into another aircraft, erupting the fuel into a blaze which then set off a chain reaction of explosives, starting with a nearby bomb that tore through the flight deck into the lower decks, setting off more explosives at varying intensities. Numbers were 161 killed, 134 injured, and 21 aircraft destroyed. This resulted in damage costs that neared the 2-billion-dollar range. [10] WHERE TNT HAS FAILED The high sensitivity of TNT has led to a multitude of cases where unintentional explosions have caused injury or death to those around it. All cases in which TNT has led to unintentional explosions were caused by munitions that were TNT exploding because of external forces such as heat and explosions A few examples include incidents that occurred to branches of the US Military. These defense organizations use TNT based munitions the most and all have experienced accidental explosions of munitions that resulted in damage to materials and loss of life. The US Army experienced an inadvertent explosion due to fire in Black Horse Camp in Kuwait in 1991. The tally of people that were killed reached 56 and the resulting damage cost around 50 million dollars. A defective heater in the munition storage room set fire to the building, leading to the nearby munitions reacting to the high temperature of the fire and causing large explosions. It was recorded that more tanks were destroyed in this accident than throughout the entire war. [10] HOW TO PREVENT UNEXPECTED EXPLOSIONS All of these incidents were unneeded and unnecessary and were all ones that could have been prevented. After incidents like the one on the USS Forrestal, the government employed engineers to develop a solution to the issues of all these explosives going off without us wanting them to. The solution is to create a munition that can withstand the extreme external stimuli that is present when explosives tend to go off without intention. These types of munitions are called insensitive munitions. An insensitive munition is exactly what its name suggests, a type of munition that “… will not detonate under any conditions other than its intended mission to destroy a target.” [1] All the factors that caused the munitions to go off in the detailed accidents have little to no 3 Aeneus Evans Brandon George effect on insensitive munitions. They will not detonate when subject to being pierced, high temperatures, or if they are near a target being hit with an explosive. They are designed to only explode when intended to. This idea of having munitions that do not explode when subject to such stimuli is not a very recent one, but the actual successful manufacturing and large adoption of one is. Insensitive Munitions Explosive 101 is the first insensitive munition to successfully be capable of resisting all external stimuli that would have previously set an explosive off. IMX-101, as it has been dubbed, was developed by BAE Systems engineers for use by the branches of the US Military to replace TNT in its entirety. IMX-101 began to be adopted by the branches of the military around 2010 and is currently being provided. At the time, in 2010, there had been an ongoing selection program to find low cost, insensitive munitions that met the requirements set by the Department of Defense. IMX-101 was found, out of the 23 that were tested, to be the cheapest solution to pass and exceed all of the tests it was put through. [5] IMX-101 is on track to take the place of TNT and make the grounds and trucks that house and transport our troops a much safer place. FIGURE 6 [14] The molecular structure for a component of IMX101: nitrotriazolone WHAT IS IMX-101 IMX-101 is a high-performance, insensitive explosive created mainly to replace TNT in artillery shells in response to accidents due to the instability of TNT and other similar explosives. BAE Systems and the United States Army developed IMX "to provide explosive force equivalent to TNT without its sensitivity to shocks, such as gunfire, explosions from improvised explosive devices, fire and shrapnel." [3] IMX is composed of 2,4-dinitroanisole (or DNAN), nitrotriazolone (or NTO), and nitroguanidine (NQ) with trace amounts of N-methyl-p-nitroaniline (MNA) for an aid in processing. This mixture of compounds is what allows IMX-101 to be so insensitive. FIGURE 7 [14] The molecular structure for a component of IMX101: nitroguanidine COMPONENTS OF IMX-101 The three figures above show the molecular structure of the three insensitive explosives uses in IMX-101. The first is DNAN, which although it is not as explosively powerful as TNT, DNAN replace the TNT formula when included in melt cast explosives. Melt cast explosives are explosives that are created by melting the main components of the explosive to the liquid state so that they can be poured into a mold and to take the shape of whatever is desired. Once poured into the mold, the explosive then undergoes a phase change back to a solid so the explosive properties can be utilized. DNAN has a relatively low melting point of 94 degrees Celsius, allowing it to be useful when an ingredient of a melt cast explosive such as IMX-101 [2]. The second explosive, NTO, adds to the insensitive nature of IMX-101. NTO has high insensitivity to heat, shock, friction while maintaining a detonation velocity equal to that of RDX, a component of TNT, at around 8,750 meters FIGURE 5 [14] The molecular structure for a component of IMX101: 2,4-dinitroanisole 4 Aeneus Evans Brandon George per second [14]. NTO is also in a high yield because of the inexpensive starting materials required to create it [14]. The third insensitive explosive, NQ, is also insensitive to heat, shock, and friction and has a high detonation velocity of 8,200 meters per second, similarly to that of NTO [14]. The compound is commonly used in explosives and has been around for almost a century due to its ability to reduce flame temperature on things like the muzzle flash of a gun firing. The lower flame temperatures help to increase the longevity of the bores of the artillery that are used to fire the explosives [14]. These three components are what make IMX-101 comparable to TNT in terms of explosive power while increasing the insensitive nature of the explosive. HOW IMX-101 WORKS FIGURE 8 [2] IMX-101 Thermal Decomposition mechanism To generate an explosion, IMX-101 works just as any other type of explosive would, with the reaction of specific ingredients so to create a large amount of excess energy. This energy then builds up in a small region of space inside the explosive and expands at a high velocity. IMX-101 uses the compounds of DNAN, NTO, and NQ to generate the explosion. But what sets IMX-101 apart from other explosives is its ability to resist exploding even when subject to intense stimuli. The insensitive nature of IMX-101 is because of the ability of its materials to decompose in a safe manner when subject to unwanted stimuli, such as intense and rapid heating. When subject to external stimuli that causes the ingredients to interact, decomposition of IMX-101 begins with low temperature dissolution of some of the solid NQ into liquid DNAN. The solution of NQ/DNAN then mixes with the bulk liquid-phase DNAN and provides contact between the NQ and NTO particle surfaces. At the contact surface, NQ becomes adsorbed onto the NTO surface. Dissolved NQ also reacts directly in the dissolved state to form its normal decomposition products, illustrated in IM3 of figure 8, while the surface reaction of NQ with NTO forms NQ and NTO decomposition products. Finally, the NQ/DNAN solution reacts with remaining liquid-phase DNAN to form a polymeric intermediate that can react with the NTO polymeric intermediate to form the final residue. The main drivers for this altered reaction scheme is the dissolution of NQ into liquid-phase DNAN [2]. The overall process of the decomposition as described as illustrated in figure 8. The main factor in the starting of the decomposition process is a shift in the normal decomposition temperatures of the main ingredients. Simplistically, whenever the main ingredients (DNAN, NQ, and NTO) interact with each other when subject to unintentional stimuli, they react with one another so to change the temperature at which they decompose. So, when a large heat source, such a fire, is near the munition, the materials simply melt and do not react with each other in a way that produces an explosion. This can also explain why IMX-101 doesn’t explode when subject to vibrations or being pierced by a bullet or shrapnel. The shift in temperature results whenever the explosive is met with any type of high energy source, such as vibrations or a bullet. The lower temperatures indicate slower reaction rates, which directly translates to the ability to consume the reactants under conditions where energy is able to be transferred before large build ups of localized energy can form cause an explosion. Thus, as summarized by the Sandia National Laboratories, “As the external event continues to drive energy into the material and increase its internal temperature, less and less energetic material is available to react and the overall response never rises to a violent event.” [2] IMX-101 VS TNT It may seem that IMX-101 is the best choice for the future of safe munitions, but when compared to TNT we can see if it really is the better alternative. In our comparison, we will discuss the explosive power of the munition, the ability to resist external stimuli, and the logistics of making and housing each type. In terms of explosive power, IMX-101 is equivalent to that of TNT. The design of IMX-101 comprises of ingredients that carry the same explosive power as that of TNT. The DNAN compound found in IMX-101 is the main contributing factor to the explosive power, as DNAN has been found to have similar explosive characteristics to that of 5 Aeneus Evans Brandon George TNT. DNAN also is intrinsically more stable than TNT, thus it has been used in other types of insensitive munitions. It is also roughly ten percent less powerful, but its use in IMX101 gives it an explosive power closer to that of TNT. [3] The ability to resist external stimuli is where IMX-101 really shines. It was designed purely to be resistive and is the clear winner when pitted against TNT. TNT is highly unstable, as even the slightest bit of mistreatment can set it off. When subject to a drop test, TNT is mostly resilient, but if any impurities form, the TNT can react causing it to explode. IMX-101 on the other hand, can withstand large amounts of impact or vibrations even when compromised. During an evaluation program to see how IMX worked, it was loaded into a 155mm M795 artillery projectile and subjected to many test, some include bullet impact with small arms, slow heating with fire in adjacent vehicle or magazine, fast heating with vehicle or aircraft fuel fire, and severe sympathetic reaction of same munition in magazine, aircraft or vehicle. All IMX-101 loaded artillery passed each of the United States Army IM tests, "further confirming its superior insensitive munition characteristics compared to TNT."[8] Onto logistics, the main comparison is the price delta. It currently costs $8 per pound to make IMX-101 and $6 per pound for TNT [6]. It is a pretty sizeable difference, but price is not the only thing that matters when it comes to logistics. In terms of storing the explosives, IMX-101 can house many more units in the same area when compared to TNT. IMX101 meets safety regulations that TNT does not that allows IMX-101 to be contained closer to weapons testing sites and military bases, along with being able to be held closer to civilian populations. storage as IMX-101. The radius for TNT is the dark green and the radius needed for PBX is light green. This is a massive difference in land area needed to store munitions. This means that insensitive munitions can be stored closer to civilian populations and testing grounds. The ability to store munitions closer to other locations decreases the amount of time necessary for the munitions to be collected and the amount of time needed to transport it from one location to the next. This at the same time reduces transportation and housing costs, so depending on the cost of housing and transportation, it could potentially cost the same for the military to use. PROBLEMS WITH IMX-101 IMX-101 is clearly the better explosive when in comparison to TNT when it comes to overall safety, while having the same explosive power. However, some small problems exist with IMX-101. The IMX compound itself does cost more to make than TNT did, starting at eight dollars per pound, while TNT was six dollars per pound [10]. This difference in starting cost is most likely due to the fact that the material to make IMX is nowhere near as accessible to manufacturers as the material needed to manufacture TNT. TNT is very cheap to make due to its easily accessibility and cheap materials, while IMX will cost more to get the materials and make the compound. The other problem that exists is that IMX-101 is a relatively new explosive, while TNT has been used for years. Even though the mass distribution of IMX-101 is under way, there is still an abundance of TNT. Logistically, simply getting rid of TNT and using only IMX-101 would be a nightmare. There are not enough resources available for the manufacturing and distribution of IMX-101. This would be inefficient and produce a sizeable amount of downtime for those who would be the last ones to receive shipments, putting those units at a severe disadvantage. Secondly there is the price delta. IMX-101 on average costs $8 per pound to manufacture and distribute, where TNT costs around $6 per pound. That may not seem like a significant margin, but when you consider the number of pounds of explosives used by the US military each year, that becomes a much larger gap. When it comes to spending large amounts of money for the defense of nation, generally the cheapest alternative takes the win. So, although IMX-101 is beginning to be rolled out to our troops, it is being distributed in smaller amounts than that of TNT. The problem of supply of explosives then becomes an issue, as the amount of available munitions is much less than before. Continuing the logistics argument, when you look at each branch of the military, the Air Force, the Army, and the Navy, they each have their own use for TNT. For example, the Navy uses TNT in underwater munitions while the Air Force uses aircraft-borne munitions. IMX-101 has had extensive testing for the Army, but not for the other two FIGURE 9 [10] Illustration of the difference in amount of space needed to securely house TNT vs an insensitive munition Figure 9 depicts the difference in space needed to house TNT versus a type of insensitive munition, both in the same quantity. In the case of the figure, the insensitive munition is HC 1.6 PBX, which meets the same qualifications for land 6 Aeneus Evans Brandon George branches. Therefore, for TNT to be entirely replaced, IMX101, or another type of insensitive munition must be able to perform well in the scenarios that the Air Force and Navy perform in. This was discussed in a paper on the problems with insensitive munitions in the US military. There was a lack of “jointness” and collaboration between the branches so that whatever was being developed for one branch was not cross compatible with the other branches [10]. Lastly, one of the biggest problems that has yet to rear its head is what happens if there were to be a mistake during production that did not allow a set to be completely insensitive? There would be no way of telling if a batch was capable of deployment unless every single batch were tested, which would cost time and money. There is always the possibility of something going wrong, and even though IMX101 is designed to prevent accidental explosions, it won’t be that way one hundred percent of the time. What happens when something does go wrong is something that should be researched more on but most likely will not be until something does go awry. It is these problems, though, that will ultimately lead to solutions to them, and right off the bat the main problem has already been diminished: sensitivity of the explosive. So, with time these problems can be fixed and we can transition towards an even safer explosive. impact test, where IMX scored the same as TNT [4]. The new proven safety features of IMX-101 showed it reliability in military use as it passed all of the U.S. Army's tests. IMX101 qualified as a main explosive and achieved qualification for the 155 M795 type projectiles [4]. Reducing the chance of fatalities in our military is an excellent step forward, but it doesn’t come without a cost. In this case, it costs more to produce IMX-101 over TNT. IMX101 costs $8 per pound, compared to the $6 per pound for TNT. This means that more of the military’s budget has to be allotted to buying the new explosives, which results in funds being reduced in other areas. It is possible that those funds might come from insurance or health care benefits that help those who have returned from wars with either physical or mental injuries. This would not be a benefit for members of the current generation. This could result in people who need help not being able to afford that help that they need so that they can live their life to the greatest extent possible. In terms of explosives, sustainability means conserving the explosive power and detonation speed while reducing the negative affects explosives have on the environment, which IMX-101 has the ability to do. During the processes of making the IMX explosive, scientists were careful with the selection of insensitive compounds that won't have such a negative environmental drawback like TNT with an unchanged net explosive power. Since IMX-101 is a new replacement for TNT, reports of its toxicity has yet to be reported, however, because TNT is one of the most commonly used explosive, its toxicity is the most characterized. TNT is known for its pollution in both soil and atmospheric scales, so much so that the United States has declared in the past a priority for the removal of TNT [9]. SUSTAINABILITY OF IMX-101 Is IMX-101 sustainable in the sense that it satisfies the needs of the current generation while also ensuring that the next generations will be able to satisfy their needs? IMX-101 is meant to make the battlefield a safer place for our soldiers so that more of them can return home to their families. That is ensuring the wellbeing of future generations, by decreasing the risk of death, allowing more families to stay whole. The children of our soldiers will be able to know that there is a much higher chance of their mom or dad returning home to them. By decreasing the chance that children of soldiers might go through the traumatic experience of losing one of their parents, it can be assured that future generations will be able to grow up without the hole that is created when a loved one dies. An investment like this to reduce military casualties sat very well with the U.S. Army, as they ordered as much as $780 million worth of IMX-101. In addition to decreasing the military accidental casualty rate, IMX-101 is also sustainable in the sense of reliability. During the US Army's search for a less dangerous explosive, they began running tests on one of the candidates, IMX. IMX was loaded into a 155mm M795 artillery projectile and underwent tests such as fast and slow heating, bullet impact, fragment impact, sympathetic reaction, and shaped charge jet impact [4]. After the completion of these tests, the performance was compared to a 155mm M795 TNT projectile and it was found that the 155mm of IMX-101 passed every test with a better score than TNT but the bullet EXPLOSIVES AFTER IMX-101 Despite the problems that come with the use of IMX101, it is still the better munition for use by our troops. The combination of insensitivity and firepower is the greater than the logistics issues that can arise. It has been proven that IMX-101 is the superior explosive, and one that will cause quite the splash in the world of insensitive munitions. In the end, IMX-101 is paving the way for the design and use of safer explosives for use by our men. It is the first major step towards eliminating our reliance on TNT. IMX-101 also opens the door for the design and manufacturing of better performing insensitive mentions that can replace other types of explosives that sensitive. The appearance of IMX-101 onto the military scene will allow other manufacturers and designers to put their best foot forward and progressively increase the quality of the munitions that we use, and soon we may live in a world where explosive devices will only explode when they are meant to, reducing the risk of our soldiers losing their lives because a munition they were transporting or housing went off when it should not have. 7 Aeneus Evans Brandon George These insensitive munitions will ultimately result in more lives safely returning home to their families. IMX-101 represents a large advancement forward in the quickly advancing world of explosives. Hopefully this trend of safer, more efficacious explosives will one day lead to fool-proof equipment, drastically decreasing unnecessary injuries and fatalities. http://www.brighthub.com/education/homeworktips/articles/85531.aspx [12] Q. J. Ding. "TriNitroToluene (TNT), the Mistaken Dynamite." TriNitroToluene (TNT), the Mistaken Dynamite. 1.1.1970. Accessed 3.302017. http://jaydenchemistry.blogspot.com/2015/07/trinitrotoluenetnt-compound-which-is.html [13] “Explosions and Explosives.” Knowledge Book. 6.16.2012. Accessed 3.30.2017. https://knowlegebookblog.wordpress.com/2012/06/16/explosi ons-and-explosives/ [14] "Insensitive Explosives." Scitoys. N.p., n.d. Web. 31 Mar. 2017. http://scitoys.com/insensitive.html SOURCES [1] A. Barrie. “Bye bye, TNT: New generation of explosives for the Army.” FOX News Network. 3.26.2013. Accessed 1.10.2017. http://www.foxnews.com/tech/2013/03/26/byebye-tnt-new-generation-explosives-for-army.html [2] R. Behrens, A. Highley, J. Kay, S. Maharrey, D. WieseSmith. “Interactions Between Ingredients in IMX-101.” Sandia National Laboratories. 4.2014. Accessed 1.26.2017. http://prod.sandia.gov/techlib/accesscontrol.cgi/2014/142012.pdf [3] M. Ervin. “Making Explosives Safer.” BAE Systems, United States. 2016. Accessed 1.10.2017. http://www.baesystems.com/en-us/feature/makingexplosives-safer [4] V. Fung. “Process Improvement and Optimization of Insensitive Explosive IMX-101.” BAE Systems. 2012. Accessed 1.10.2017. http://dtic.mil/ndia/2012IMEM/13862fung8B.pdf [5] J. Oxley, J. Smith, M. Donnelly, K. Colizza, S. Rayome. “Thermal Stability Studies Comparing IMX-101 (Dinitroanisole/Nitroguanidine/NTO) to Analogous Formulations Containing Dinitrotoluene.” Propellants, Explosives, Pyrotechnics. 9.23.2015. Accessed 1.26.2017 http://onlinelibrary.wiley.com/doi/10.1002/prep.201500150/f ul [6] S. Ottewell. “Chemical Engineers Make Explosive Progress.” Chemical Processing. 12.14.2010. Accessed 1.10.2017. http://www.chemicalprocessing.com/articles/2011/chemicalengineers-make-explosive-progress/ [7] J. Pike. “Insensitive Munitions (IM).” Global Security. 7.7.2011. Accessed 1.25.2017. http://www.globalsecurity.org/military/systems/munitions/im. htm [8] “Army approves safer explosive to replace TNT.” U.S. Army. 8.11.2010. Accessed 1.10.2017. https://www.army.mil/article/43553/army[9] "Trinitrotoluene." Wikipedia. Wikimedia Foundation, Web. Accessed 2.10 2017. https://en.wikipedia.org/wiki/Trinitrotoluene [10] K. Graham. “Insensitive Munitions – US Problems and Solutions.” NATO. Accessed 3.2.2017. https://www.sto.nato.int/publications/STO%20Educational% 20Notes/STO-EN-AVT-214/EN-AVT-214-05.pdf [11] "The History of TNT Explosive - A Safer Explosive." Bright Hub. 7.2.2013. Accessed 3.3.2017. ACKNOWLEDGMENTS We would like to thank our conference chair and cochair Mark Jeffrey and Iman Basha for their insight and advice in regard to our paper. Their input was very valuable and enabled us to complete the paper in a timely fashion. Also, we would like to extend our gratitude to peers Seth So and Ben K. Koo for their tireless efforts in provision of moral support. 8
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