Thermal Stability and Detonation Characteristics
of Pressed and Elastic Explosives on the Basis of Selected
Cyclic Nitramines*)

 


Ahmed ElbEIh, Jiĝí PAChMÁÑ and Svatopluk ZEMAN

Institute of Energetic Materials,
Faculty of Chemical Technology, University of Pardubice,
CZ-532 10 Pardubice, Czech Republic


Waldemar A. TRZCIÑSKI

Institute of Chemistry, Military University of Technology,
PL-00-908 Warsaw, Poland

Zbynìk AKŒTEIN

Research Institute of Industrial Chemistry, Explosia,
CZ-531 17 Pardubice, Czech Republic


muhamed SUĈESKA

Brodarski Institut - Marine Research & Special Technologies,
HR-10020 Zagreb, Croatia

Abstract: bicyclo-hmX (cis-1,3,4,6-tetranitro-octahydroimidazo-[4,5-d]
imidazole or bChmX) was studied as a plastic explosive bonded with the C4
matrix and with Viton A. Also a series of nitramines namely rDX (1,3,5-trinitro-
1,3,5-triazinane), hmX (1,3,5,7-tetranitro-1,3,5,7-tetrazocane) and hNIW
(?-2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane, ?-Cl-20) were
studied for comparison with the same types of binders. The detonation velocity, D,
of all prepared mixtures was measured. Their thermal stability was determined using
*) Presented in a part at the 13th Seminar NTrEm, University of Pardubice,
April 2010218 A. Elbeih et al. non-isothermal differential thermal analysis (DTA).
While the C4 matrix lowers
the thermal stability of the resulting explosives, Viton A enhances this stability.
Approximate relationships between the peaks of exothermic decomposition and
the D values were found. The detonation parameters were also calculated by means
of kamlet & Jacobs method, ChEETAh and improved EXPlO5 code for all the
mixtures. From the measured D values and the calculated detonation parameters,
it is obvious that the detonation parameters of bChmX-mixtures are very close
to hmX-explosives and better than those of rDX-mixtures. It was found that the
C4 matrix reduces the difference between the values of energy of detonation in
the studied C4 mixtures. As expected, the pressed hNIW-Viton A mixture has the
highest detonation parameters of all of the prepared mixtures.

Keywords: detonation, C4 matrix, bChmX, hmX, hNIW, rDX, stability,
Viton