Chemistry Reference
In-Depth Information
Fig. 9.9
Plots of the
nonisothermal rate of
NG-2-60-DTM (sample 1)
decomposition against the
conversion degree at heating
rate
min
0.4
= 14
.
1(
1
), 8.8 (
2
), 5.6
(
3
), 3.4 (
4
), 2.8 (
5
), 1.7 (
6
)
◦
C
min
−
1
ω
0.3
(DTA)
0.2
0.1
0.2
0.4
0.6
0.8
2
.
6kJg
−
1
, the first stage heat release is approximately
equal to 0.35
Q
for a 27% weight change. Thus, the thermal effect of the dominant
first-stage reaction (
Q
1
≈
the total thermal effect
Q
≈
3
.
3kJg
−
1
) is much higher than that of the second-stage
2
.
3kJg
−
1
).
The addition of Fe
2
O
3
was found to result in the significant acceleration of both
process stages (Fig. 9.11), which agrees with literature data [4, 5]. The dependencies
of the effective activation energy on the conversion degree for both samples are
presented in Fig. 9.12.
reaction (
Q
2
≈
9.3 Effect of Gas-Phase Processes and Pressure
on the Macrokinetics of High-Temperature Decomposition
of AP-Based Composite Solid Propellants
Since model and commercial composite solid propellants are heterogeneous sys-
tems, the effect of the products of AP gasification on the decomposition mecha-
nism is quite important. The term “gasification” is used to emphasize that at AP
