Environmental Engineering Reference
In-Depth Information
Fig. 5.10
The denitration
rate of several nitrate esters in
a mixed acid
9
4
8
NG
GDN
DEGDN
TEGDN
7
6
5
3
4
3
2
2
1
1
0
0
100
200
300
400
˄
min)
5.3.2.2 Stability and Property of Thermal Decomposition
The chemical stability of diethylene glycol dinitrate is roughly equal to nitroglyc-
erine. Its hydrolysis is very slow even under hot water. For example, only 0.003 %
diethylene glycol dinitrate is hydrolyzed at 60
C for 120 h. It will be decomposed
by waste acids. The denitration rate of diethylene glycol dinitrate in the mixed acid
with 7.5
°
1.1 % H
2
O is shown in Fig.
5.10
.
The chemical stability of diethylene glycol dinitrate is related to the denitration
temperature. The stability of diethylene glycol dinitrate with high denitration
temperature is better than that with low denitration temperature. The relationship is
shown in Table
5.17
.
Based on the properties of diethylene glycol dinitrate, it can be applied in
propellant with smokelessness, no ablation, and non-
10.5 % HNO
3
and 0.5
-
-
fl
ame, and in liquid
explosives.
5.3.2.3 Explosion Property
Diethylene glycol dinitrate will be exploded at 200
C with explosion heat of
4476.9 J/g. Its shock sensitivity is poorer than TNT. The characteristic height is
160 cm for 2 kg falling weight. The ignition is dif
°
flame. It would
not be exploded like nitroglycerine after ignition. In a glass tube with a diameter of
5
-
6 cm, it would be burnt at 15
°
C.
The detonation velocity of diethylene glycol dinitrate is dependent on the con-
ditions of loading. At optimal conditions, the detonation velocity is up to 6,800 m/s.
However, at some conditions, the detonation velocity is only 1,800
cult directly by a
fl
2,300 m/s. Its
detonation property is poorer than nitroglycerine with lead-block value of 425 cm
3
,
about 70 % of nitroglycerine. The liquid explosive mixture of diethylene glycol
dinitrate, nitroglycerine, and glycol dinitrate has twice explosion strength to TNT.
-
