Physical Characterization of RX-55-AE-5 a Formulation of 97.5 % 2,6-Diamino-3,5-Dinitropyrazine-1-Oxide (LLM-105) and 2.5% Viton A

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With the use of modern tools such as molecular modeling on increasingly powerful computers, new materials can be evaluated by their structural activity relationships, SAR, and their approximate physical and chemical properties can be calculated in some cases with surprising accuracy. These new capabilities enable streamlined synthetic routes based on safety, performance and processing requirements, to name a few [1]. Current work includes both understanding properties of old explosives and measuring properties of new ones. The necessity to know and understand the properties of energetic materials is driven by the need to improve performance and enhance stability to various stimuli, ... continued below

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Weese, R K; Burnham, A K; Turner, H C & Tran, T D July 28, 2005.

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With the use of modern tools such as molecular modeling on increasingly powerful computers, new materials can be evaluated by their structural activity relationships, SAR, and their approximate physical and chemical properties can be calculated in some cases with surprising accuracy. These new capabilities enable streamlined synthetic routes based on safety, performance and processing requirements, to name a few [1]. Current work includes both understanding properties of old explosives and measuring properties of new ones. The necessity to know and understand the properties of energetic materials is driven by the need to improve performance and enhance stability to various stimuli, such as thermal, friction and impact insult. This review will concentrate on the physical properties of RX-55-AE-5, which is formulated from heterocyclic explosive, 2,6-diamino-3,5-dinitropyrazine-1-oxide, LLM-105, and 2.5% Viton A. Differential scanning calorimetry, DSC, was used to measure a specific heat capacity, C{sub p}, of {approx} 0.950 J/g {center_dot} C, and a thermal conductivity, {kappa}, of {approx} 0.160 W/m {center_dot} C. The Lawrence Livermore National Laboratory (LLNL) code Kinetics05 and the Advanced Kinetics and Technology Solutions (AKTS) code Thermokinetics were both used to calculate Arrhenius kinetics for decomposition of LLM-105. Both obtained an activation energy barrier E {approx} 180 kJ mol{sup -1} for mass loss in an open pan. Thermal mechanical analysis, TMA, was used to measure the coefficient of thermal expansion, CTE. The CTE for this formulation was calculated to be {approx} 61 {micro}m/m {center_dot} C. Impact, spark, friction and evolved gases are also reported.

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PDF-file: 13 pages; size: 0.7 Mbytes

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  • Presented at: North American Thermal Analysis Society 33rd Annual Conference, Universal City, CA, United States, Sep 19 - Sep 21, 2005

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  • Report No.: UCRL-CONF-214557
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 881657
  • Archival Resource Key: ark:/67531/metadc886363

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  • July 28, 2005

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  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 8, 2016, 8:57 p.m.

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Weese, R K; Burnham, A K; Turner, H C & Tran, T D. Physical Characterization of RX-55-AE-5 a Formulation of 97.5 % 2,6-Diamino-3,5-Dinitropyrazine-1-Oxide (LLM-105) and 2.5% Viton A, article, July 28, 2005; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc886363/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.