Surface Coating of Cyclotetramethylenetetranitramine (HMX) Crystals with the Insensitive High Explosive 1,3,5-Triamino-2,4,6-trinitrobenzene (TATB)

• Autorzy: Nandi A. K. , Ghosh M. , Sutar V. B. , Pandey R. K.
• Języki publikacji: EN

Abstrakty

EN

A method to crystallize the thermally stable, insensitive high explosive, 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) onto the surface of another high explosive cyclotetramethylenetetranitramine (HMX) crystal is described. Amination of 1,3,5-trichloro-2,4,6-trinitrobenzene (TCTNB) in toluene produces TATB which is precipitated by a reactive crystallization process. When the reaction is carried out in the presence of HMX, TATB crystals are found to be deposited onto the HMX crystal surface. This phenomenon was utilized to obtain in situ surface coating of HMX crystals with TATB. Both the conventional amination and the sonochemical amination methods, using dry ammonia (NH3) gas and ammonium hydroxide (NH 4 OH) respectively as the aminating agents, were studied. The coated materials were characterized by Scanning Electron Microscopy (SEM), Differential Scanning Calorimetry (DSC), Simultaneous Thermal Analysis (STA) and sensitivity tests. The results were compared with those of the virgin materials. Sonochemical amination provided a uniform coating of the HMX crystals. Coated HMX has shown substantial friction insensitivity gain as compared to uncoated HMX. However there is a drop in impact insensitivity in the coated materials.

Słowa kluczowe

EN

surface coating; cyclotetramethylenetetranitramine; 1,3,5-triamino-2,4,6-trinitrobenzene; 1,3,5-trichloro-2,4,6-trinitrobenzene; scanning electron microscope

• Wydawca: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2012
• Tom: Vol. 9, nr 2
• Strony: 119--130
• Opis fizyczny: Bibliogr. 11 poz.

Twórcy

autor

Nandi A. K.

autor

Ghosh M.

autor

Sutar V. B.

autor

Pandey R. K.

• High Energy Materials Research Laboratory, Chemical Engineering and Pilot Plant Division, Sutarwadi, Pune-400021, India,

Bibliografia

• [1] Bechmann W.E., Jener E.L., Cyclic and Linear Nitramines Formed by Nitrolysis of Hexamine, J. Am. Chem. Soc., 1951, 73, 2769-2773.
• [2] Das S., Raut V.D., Gawande N.M., Khopade R.S., Narasimhan V.L., Studies on Yield Improvement of High Melting Explosive (HMX), Indian J. Chem. Tech., 2006, 13, 404-410.
• [3] Krober H., Tiepel U., Leisinger K., Krause H., Formation of HMX Crystals with High Internal Quality by Cooling Crystallization, 29th International Annual Conference of ICT, Karlruhe, 30thJune – 2nd July, 1998, 66.1- 66.18.
• [4] Basu S., Gawande N.M., Apte M.E., Narasimhan V.L., Crystallization of HMX in Acetone-water System, Indian J. Chem. Tech., 2004, 11, 575-581.
• [5] Benziger T.M., Manufacture of TATB, 12th International Annual Conference of ICT, Karlsruhe, July 1-3, 1981, 491-503.
• [6] Narasimhan V.L., Bhattacharyya S.C., Mandal A.K., Nandi A.K., Basu S., Scaling up the Process for Preparing 1,3,5-Triamino-2,4,6-trinitrobenzene(TATB), Final Technical Report No. 6/2006 , High Energy Materials Laboratory, Sutarwadi, Pune, India, 2006.
• [7] Kolb R., Rizzo H.F., Growth of 1,3,5-Triamino-2,4,6-trinitrobenzene (TATB) I. Anisotropic Thermal Expansion, Propellants Explos. Pyrotech., 1979, 4, 10-16.
• [8] Cady H.H., LarsonA.C., The Crystal Structure of 1,3,5-Triamino-2,4,6-trinitrobenzene, Acta Crystallographica, Part-3, 1965, 18, 485-496.
• [9] Kennedy J.E., Lee K.Y, Spontarelli T., Stine J.R., Detonation Spreading in Fine TATBs, 24th International Pyrotechnics Seminar, Monterey, California , USA, July 27-31, 1998, 743-748.
• [10] Hoffmann H., Rudolf K., Process for the Production of a Pressed Insensitive Explosive Mixture, US Patent: 2004/ 0216822 A1, 2004.
• [11] Myerson A.S., Rajiv Ginde, Crystals, Crystal Growth, and Nucleation, in: Handbook of Industrial Crystallization, (Allan S. Myerson Ed.), Butterworth-Heinemann series in Chemical Engineering, Boston, USA, 1993, 44-46.