Burning rate tetryl

When confined in a 24 mm diameter tube, tetryl is capable of burning. According to Andreyev [53], at a density of 0.9, the rate of burning of tetryl can be expressed as a function of temperature by the equation ... 

F1g. 6. Rate of burning of tetryl against initial temperature, according to Andreyev [53]. 

Combustion. 1) V.E. Annikov et al, Effect of Water, Ammonium Carbonate and other Additives on Combustion of Explosives , FizGoreniya-Vzryva 5 (1), 60-67 (1969) CA 71, 40905 (1969) [The authors state that the effects of w on the burning rate of Tetryl and RDX in a constant pressure bomb can be explained by the Zel dovich (1942) theory. They report that the burning rate of RDX with iO to 20% w added is higher because of strong turbulence] 2) M A. 

This expression is valid for 10 p 250 atm = The burning rate of Tetryl (as well as many other pynk ig little bv initial tmmn Fnr A... 

A recent study by Glazkova (Ref 59) investigated the effect of additives on the burning rate of Tetryl, She gives a somewhat different dependence of um on p than that given in Ref 25a, namely ... 

Burning of tetryl is discussed in the monograph by Glazkova [92] and reference is given to the early work of Hinshelwood [93] who pointed out that thermal decomposition of tetryl produces picric acid which plays the part of a catalyst of the decomposition. The rate of burning of tetryl under pressure increases by addition of potassium bichromate, according to Glazkova [92]. 

This expression is valid for 10 p 250 atm. The burning rate of Tetryl (as well as many other expls) is little affected by initial temp. For a temp increase of 100 the burning rate increases by a factor of less than two-fold. The apparent activation energy for this temp effect is about Tkcal/mole... 

Addition of small amounts of w reduces the burning rate of Tetryl packed to li.21 to 1.35 g/cc. At 100 atm ambient pressure this effect is as follows ... 

The above relations are also claimed to hold for Tetryl with 5% of Cu oxalate. Other additives, in 5% amts, also had relatively little effect on the burning rate of Tetryl. This is shown as follows ... 

Quinone Diazides. E. von Herz (Ref 1) proposed the use of nitrated quinone diazides and tetra-zides of polyhydric phenols or their metallic salts in percussion caps and primers, either as a top charge over a main charge (Tetryl, PETN or TNT), or in mixts with usual primary expls such as LA, MF, etc. Typical compds were 4,6-dinitro-2-quinone diazide, the K salt of dinitro-3-hydroxy quin one diazide, metallic salts of dinitro-4-hydroxyquinone diazide, the Pb salt of dinitro-3,5-dihydroxyquinone diazide, and sym-tetra-nitrodihydroxydiphenylolquinone tetrazide J.E. Burns (Ref 2) proposed the use of nitrated quinone diazides, such as the 2,6-dinitro-2-diazide, with Pb pic rate, Na nitrate, Pb thio-... 

ITC heating of Iclryl increases the rate of burning of the substance. Tlus was already shown by Andreev (V ol. Ill, Fig. 6), by his later work [94J and substantiated by M. M. Jones and Jackson [87] and Japanese authors [86). Tire latter authors found for example that preheating the sample to 180 C lowers its ni.p. by 20 C and the decomposition temperature by 12 C. They also examined the samples of tetryl heated at 165°C for 3 hours by liquid chromatography, by TLC, NMR and mass specirography. They found that 2,4.6-trinitroanisol and picric acid are fonned on the thermal decomposition of tetryl at I60--200 C. 

---