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OCTOL<br />

5. THERMAL PROPERTIES<br />

66<br />

5.1 Phase Changes.<br />

5w<br />

Temperature<br />

m<br />

Latent Heat<br />

(Cal/g)<br />

75/25 70/30<br />

Solid-to-slurry 79 5.87 7.05<br />

5.6 Heats of Combustion and Formation.g<br />

Constituent<br />

AH:<br />

(kcal/mole)<br />

AH;<br />

(kcal/mole)<br />

TNT -817.2 -12.2<br />

HMX -660.7 11.3<br />

5.7 Thermal Decomposition Kinetics.’<br />

Decomposition energy<br />

Activation energy<br />

Pre-exponential factor<br />

, /<br />

TNT HMX<br />

300 Cal/g<br />

34.4 kcal/mnle<br />

2.5 x loll/s<br />

5.8 Other Thermal Stability Test Results.<br />

Test Results<br />

500 Cal/g<br />

52.7 kcal/mole<br />

5 x lO’S/s<br />

Vacuum 0.1-0.4 ml/g of gas evolved<br />

after 48 h at 120°C<br />

DTA and pyrolysis<br />

Critical temperature, Tm<br />

Charge radius, a<br />

Density, p<br />

See Fig. 2<br />

281°C<br />

3.7 mm<br />

1.70 g/cma

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