Environmental Engineering Reference
In-Depth Information
rays with 900 J, it will be exploded immediately. Nitroglycerine is very sensitive to
ʳ
-rays and gases of N
2
, nitrogen oxides, H
2
, CO, and CO
2
will be released under
irradiation.
5.4.1.2 Explosion Property
Generally, the explosive decomposition of nitroglycerine is done by the following
equation:
5
2
H
2
O
3
2
N
2
þ
1
4
O
2
ð
Þ
3
!
3CO
2
þ
þ
C
3
H
5
ONO
2
The explosion heat of nitroglycerine under normal conditions is 6,213 J/g and
the speci
c volume V
0
is 715.7 mL/g. The explosion strength f
0
at 4,250
°
Cis
9,292 m.
The sensitivity of nitroglycerine is related to the condition of stability treatment.
Based on the experiments performed in Liu Jieping
s group, it was found that
nitroglycerine, which was treated for stability by normal
'
filtrated water after
nitration, was exploded at the condition of vibration of 200 Hz. However, if it was
treated by deionized water, nitroglycerine was not exploded even under vibration of
800 Hz.
Nitroglycerine is sensitive to shock. Solid nitroglycerine after adsorption has an
enhanced impacted force. Liquid nitroglycerine or its shock wave has a minimum
impact force. The relationship between the shock sensitivity of nitroglycerine and
its phase is shown in Table
5.44
.
The shock sensitivity of the mixture of liquid and crystallite nitroglycerine is
higher than single phase of nitroglycerine because of the friction between sensitive
liquid and crystallites. The probability of nitroglycerine explosion after gun
shooting is 100 %. The lead-block value of nitroglycerine is related to the deto-
nating strength. The lead-block values of nitroglycerine detonated by different
detonators are listed in Table
5.45
.
Table 5.44
The relationship between the shock sensitivity of nitroglycerine and its phase
Phase
Impacted force (kg m/cm
2
)
Explosion ratio (%)
Liquid
0.08
10
0.11
50
0.40
100
Stable crystallite
0.51
10
0.65
50
0.82
100
Unstable crystallite
0.63
10
0.78
50
0.93
100
