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5.7 Thermal Decomposition Kinetics.6<br />

Decomposition energy<br />

Activation energy<br />

Pre-exponential factor<br />

TNT RDX<br />

300 Cal/g<br />

34.4 kcal/mole<br />

2.51 X lO”/s<br />

5.8 Other Thermal Stability Test Results.<br />

Test Results<br />

500 Cal/g<br />

47.1 kcal/mole<br />

2.02 x 10%<br />

Vacuum 0.4-0.5 ml/g of gas evolved<br />

after 48 h at 120°C<br />

DTA and.pyrolysis<br />

See Fig. 2<br />

Critical temperature, Tm 208°C<br />

Charge radius, a 3.5 mm<br />

6. DETONATION PROPERTIES<br />

6.1 Detonation Velocity.’<br />

CYCLOTOL<br />

Effect of Charge Radius<br />

Charge radius affects the detonation velocity of unconfined Cyclotol75/25 cast to<br />

a density of 1.740 g/cm8 as follows.<br />

D(R) = 8.210[(1 - 4.89 x 1O-2/R) - O.llWR(R - 2.4411,<br />

Fig. 2. Cyclotol 75/25 DTA and pyrolysis test results.<br />

29

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