Chemistry Reference
In-Depth Information
Fig. 9.18
Plots of the
decomposition rate of the
AP-PS mixture (second
stage) against the temperature
at
P
∞
= 10
5
Pa (
1
), 1 MPa (
2
)
2
4.0
3.5
3.0
2.5
2.0
1.35
1.45
k
2
= 10
9
.
8
±
0
.
5
exp
s
−
1
.
40900
±
1500
−
(9.6)
R
T
The same pattern was observed for the NG-2-60-DTM material (Fig. 9.19). The
influence of the ambient pressure on the first-stage process was found to be similar
but much weaker.
Fig. 9.19
Effect of
P
∞
on the
min
-1
rate of NG-2-60-DTM
decomposition:
1
and
2
,
P
∞
= 10
5
Pa;
3
and
4
,
P
∞
= 1MPa;
1
and
3
,
ω
0.20
0.15
= 2
.
9 deg min
−
1
;
2
and
4
,
= 3
.
4 deg min
−
1
ω
0.1
0.05
9.4 Mechanism of High-Temperature Decomposition
of AP-Based Model Mixtures and Composite Solid
Propellants
The data on the thermal decomposition of the heterogeneous condensed systems
studied indicate a complex process. The decomposition of AP and most of the mix-
tures occurs via two stages, with the exception of the AP (coarse)-PE system, which
decomposes in a single stage. The organic binder mainly influences the first stage of
AP decomposition. For the AP-PS, AP-PAN and AP-PVC mixtures, the first de-
composition stage (
Q
1
= 0
.
2-0
.
5kJg
−
1
,
E
1
= 133-142 kJ mol
−
1
,
T
1
= 290-370
◦
C)
