Particle size control of 1,3,5-triamino-2,4,6-trinitrobenzene by recrystallization from DMSO
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Batches of up to 46g of the insensitive explosive 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) have been recrystallized from DMSO in an effort to prepare larger particle-size material for recycling previously-used TATB and also for use in special formulations. The first part of the study investigated the conditions required to shift the particle-size distribution maximum from ∼50–70 μm to several hundred micrometres in diameter. Distributions peaking at ∼200–246 μm were successfully produced by varying the cooldown rate and degree of agitation during cooling. The second part of the study emphasized regeneration of the standard ∼50–70 μm distribution from submicron size (“ultrafine” TATB) particles. The distributions peaking at ∼76–88 μm, ∼27–31 μm, and ∼15–17 μm, successfully bracketed the target particle sizes, were grown by changing the degree of solution saturation. The choice of saturation temperature for the TATB/DMSO solution was based on earlier small-scale recrystallization and solubility work.
KeywordsPolymer Particle Size DMSO Recrystallization Explosive
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- 1.B. M. Dobratz, “LLNL Explosives Handbook: Propertiesof Chemical Explosives and Explosive Simulants”, UCRL-5 2997 Change 2, Lawrence Livermore National Laboratory, Livermore, CA, Jan. 1990.Google Scholar
- 2.“Material Specifications for TATB”, Drawing No. 13Y-188025 (Revision 2) Los Alamos National Laboratory, Los Alamos, NM, June 1983.Google Scholar
- 3.“Specification for Ultrafine TATB”, Drawing No. RM254959 (Issue B), Los Alamos National Laboratory, Los Alamos, NM, Dec. 1981.Google Scholar
- 4.A. E. Oberth, “Principles of Solid Propellant Development”, CPIA Publication 469, The Johns Hopkins University, Laurel, MD, Sept. 1987, Chapter 5.Google Scholar
- 5.D. M. Hoffman, L. Spellman, C. M. Walkup and W. C. Tao, “Next Generation Insensitive, “Tough” ExtrusionCast Explosive (ITECX)”, Lawrence Livermore National La-boratory, Livermore, CA, in preparation.Google Scholar
- 7.T. M. Benziger and R. K. Rohwer, “Pilot Plant Produc-tion of Triaminotrinitrobenzene (TATB)”, LA-3632, LosAlamos Scientific Laboratory, Los Alamos, NM, Nov. 1966.Google Scholar
- 8.M. F. Foltz, D. L. Ornellas and P. F. Pagoria, “Small-scale Recrystallization and Solubility of 1,3,5-Triamino-2,4,6-trinitrobenzene in DMSO”, UCRL-JC-116398, LawrenceLivermore National Laboratory, Livermore, CA, Feb. 1994.Google Scholar
- 9.K. J. Scribner, “HMX Particle Size Analysis, RoundRobin”, UCRL-ID-110679, Lawrence Livermore NationalLaboratory, Livermore, CA, June 1992.Google Scholar
- 10.D. M. Hoffman, Lawrence Livermore National Laboratory, personal communication, 1993.Google Scholar
- 11.R. B. Byrd, W. E. Stewart and E. N. Lightfoot, Transport Phenomena (Wiley & Sons, New York, 1960) p. 528.Google Scholar