urbaf2

592 CHEMISTRY AND TECHNOLOGY OF EXPLOSIVES

TABLE 129

Concentration of

nitrobenzene

%

Rate of

detonation

m/sec

Crusher gauge

figures

mm

5.0 6870 4.32

10.0 7030 4.50

15.0 7480 5.25

20.0 7550 5.43

22.5 7700 5.45

25.0 7575 5.66

30.0 7500 5.25

35.0^7220 5.20

40.0^7000 4.92

50.0^6700 4.40

70.0^5800 3.20

80.0 no detonation no detonation

Nitroglycerine

TNT

7450

7200 4.2

Sensitiveness

to impact kgm/cm^2

4.80

4.30

4.30

3.65

5.15

8.06

8.06

15.00

15.00

no explosion

,,

,,

4.75

11.1

The highest rate of detonation was obtained with a solution containing 22.5%

of nitrobenzene, which also proved to be more powerful than nitroglycerine. With

regard to sensitiveness to impact, a solution containing 5-10% of nitrobenzene

has shown some similarity to nitroglycerine, while that containing 30-40% of

nitrobenzene resembled TNT.

T. Urbanski, Piskorz, Maciejewski and Cetner [59] investigated the properties

of stoichiometric mixtures of tetranitromethane with benzene and with aromatic

nitro compounds. The results obtained are tabulated below (Table 130).

Composition of the mixture

Other component Concentration

wt. %

Benzene 13.75

Nitrobenzene 23.15

o- Nitrotoluene 21.30

p- Nitrotoluene 21.30

m- Dinitrobenzene 34.05

TNT 39.85

α− Nitronaphthalene 19.70

Tetryl 51.00

Tetra-

nitromethane

concentration

wt. %

Density

g/cm^3

Rate of

detonation†

in 20 mm

glass tube

m/sec

86.25 1.47 7180

76.85 1.53 7430

78.70 1.52^7770

78.70 1.52 8170

65.95 1.53 6670

60.15 1.58 6670

80.30 1.57 8160

49.00 1.63 7100

TABLE 130

Lead block

expansion

cm^3

520

470

480

495

650

565

490

570

† For the initiation a No. 8 detonator and 10 g of TNT were applied.