Power of expls

It should be noted that Al, which increases power of expls, lowers the deton velocity. Baum explains it by the fact that Al reacts with products of deton oniy in the rarefaction wave zone and this excludes the transfer of energy evolved by Al into deton wave so that vel could be increased... 

Accdg to definition given in Blinov s, "Kurs Artiilerii , (Artillery Course), rugasnost is the destructive action caused by die gases of an explosive and is expressed by the cubic centimeters of expansion products in the cavity of a lead block by exploding a I0g sample. The test is a modification of Trauzl Test, used for detn of power of expls (See Fugasnyi Snariad) Ref Fedoroff et al, PATR 2145(1955), p Rus 7-L... 

Absolute method of measurement of power of expls see Power of expls measurements 1 XX 8 P364-P366... 

Several procedures have been used to measure the power of expls, ie, the ability to do work (see Vol 8, P364-L), which is fundamentally based on the heat of detonation. Test data comparative with TNT are given in Table 6. It is apparent that TNT has less power than the other materials listed, regardless of the type of test used... 

Refs 3 4) to measure the power of the expl, but due to the difficulties of determination of C, the product V0Q has often been used instead. However, both of these expressions are unsuitable for expressing the power of expls, as can be seen from some comparative values given on p B105-R of Ref 4. However, this does not prove conclusively that the above expressions are without practical significance... 

N 16.47%, OB to C02 —103.4%, triclinic needles (from ale). prisms (from acet), mp 238.2°, bp expl at 415°, d 1.48g/cc. Insol in w, si sol in hot ale eth, misc in hot acet benz. Can be prepd by treating mesitylene with a mixt of. nitric sulfuric acids in the cold (Refs 2 3). Blanksma (Ref 4) prepd it by dissolving mesitylene in sulfuric acid, partial sulfonation taking place, and then adding the soln to nitric acid, with the pptn of trinitio-mesitylene. Kholevo (Ref 6) nitrated mesitylene with nitric acid 27, sulfuric acid 69, water 4% to yield white crysts. The expl power of trinitro-mesitylene is less than PA (Ref 9), and it develops a bomb press 84% that of TNT (Ref 8), Its impact sensitivity is 52% that of TNT (Ref 7), and it expls at 415° (Ref 5)... 

Methylnitropropanediol dinitrate is nearly as powerful an expl as TNT, but more brisant, comparable to Tetryl. It was prepd during WWII on a lab scale in Ger, and examined from the point of view of its gelatinizing properties on NC. Such properties were found to be rather poor, although its volatility, stability, etc were satisfactory (Ref 4)... 

P.A." Explosives. A variety of expl blends, patented by the firm of Bombrini-Parodi-Delfmo of Rome, consisting of PETN desensitized with pentaerythritol acetate. These expls can be cast below 100°, are less sensitive to shock than PETN, but more sensitive than TNT. Although they are less powerful and brisant than PETN, they are more so than TNT. Their stability is less than that of TNT. Their advantage in comparison with RDX formulations lies in the uniformity of the blend... 

The low value of the expl power of oxygen atoms bonded with carbon and hydrogen atoms in such a group as COOH had already been stressed by Stettbacher (Ref 2), who also pointed out that an exception is provided by peroxides and ozonides which form exothermic bonds that considerably enhance expl performance... 

Thus we see that there is reasonable correlation between power of an expl, measured in a variety of ways, and its heat of detonation. Earlier in this article it was mentioned that power can also be correlated with rv=Tj The latter correlation follows directly from Eq (1) if cvf f(T). With this restriction, the two middle integrals of Eq (1) give... 

Nine runs on JPN propint gave an average Qv of 1110 140cal/g at 250°. Systems examined included N-5, JPN, ABL-2056, TNT/AN/NaCl, TNT/AN/paraffin, and C(NC>2)4 proplnts TNT, RDX, PETN, Tetryl, and NG expls. DTA-detd Qv values can be misleadingly low when evaluating the potential destructive power of a material... 

The power and brisance of expls do not depend upon the rate of deton but rather on the energy of formation of expl and the energy of recombination of products of deton. The different valence bonds of the same compd may be of different sign in respect to their heat of formation... 

Detonation (and Explosion), Energy Relationships in. Under the title "Energy Relationships , C.G. Dunkle treats in the lecture, delivered at Picatinny Arsenal, Dover, NJ on Dec 13, 1955, pp 10-14, the following subjects a) Heat and energy of reaction of expls b) Heats of detonation and explosion c) Alternate deton rates d) Force, power or impetus of expls e) Brisance and f) Detonation pressure... 

Ubbelohde J. Copp, "Detonation Processes in Gases, Liquids and Solids , pp 577-609 of the book "Combustion Processes , edited by B. Lewis et al, Prince-tonUnivPress, Princeton, NJ (1956), 84 refs 38) W.E. Deal, JChemPhys 27, 796-800(1957) (Measurement of Chapman-Jouguet pressure of expls) 38a) D.R. White, JFluidMech 2, 513-14(1957) (On the existence of higher than normal deton pressures) 39) J.F. Roth, Explosivst 1957, 161-76 (Ballistic Methods for Measuring Explosive Power and Detonation Shock) 40) Dunkle s Syllabus, (1957-1958), pp 1-3 (Measurement of detonation pressure) 1 78-81 (Calcn of detonation pressures and densities) ... 

Typical Jetcord comes in a veriety of sizes for special applications. The powerful linearshaped chage permits demolition contractors to cut supporting steel structures with a few ounces of expl rather than depend on the blast effect of large quantities of expls. Jetcord has been used successfully to demolish buildings bridges Ref Industrial Research Magazine (April 1974), pp 67-70... 

N 34.14%, OB to C02 —58.5%. This compd is an expl having 118% the power of TNT by ballistic mortar test. It is listed by Blatt as Trimetbylene-1,3-dinitramine... 

A sensitive and powerful blasting expl is obtained by mixing 6 parts of a light fuel oil with 94 parts hi gh d micro prills having a bulk d of lOOlbs/cu ft and contg 94% NH4N03, 5% of a hydra table salt, such as Mg (NOa ... 

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