The Chemistry of Powder and Explosives - Sciencemadness Dot Org

STABILIZERS 309
stable as those containing 2% of diphenylamine (which does
react).
In a series of researches extending over a period of 15 years
Marqueyrol" has determined the effect of various substances,
particularly naphthalene, mononitronaphthalene, diphenylbenzamide,
carbazol, diphenylamine, and diphenylnitrosamine, upon the
stability of smokeless powder at 110°, 75°, 60°, and 40°. Samples
of poudre BF 12 were made up containing different amounts of
each stabilizer, and were subjected to dry heat in open vessels
and in vessels closed with cork stoppers. Samples were removed
from time to time and the nitrogen content of their nitrocellulose
was determined. A sample of the powder was taken up in a
solvent, and precipitated in a granular state; the precipitate was
washed with cold chloroform until a fresh portion of chloroform
was no longer colored by 18 hours contact with it, and was dried,
and analyzed by the nitrometer. It was necessary to isolate the
pure nitrocellulose and to separate it from the stabilizer, for the
reason that otherwise the stabilizer would be nitrated in the
nitrometer and a low result for nitrogen would be secured. A
selected portion of Marqueyrol's results, from experiments carried
out by heating in open vessels, are shown in the tables on
Days of heating at 40° . 0 387 843 1174 2991 3945 4016
Analysis:
no stabilizer
2% amyl alcohol
8% "
1% diphenylamine
2%
5%
10%
Days of heating at 60°
Analysis:
no stabilizer
2% amyl alcohol
8% "
1% diphenylamine
2%
5% "
10%
201.8
2022
201.4
2013
199.5
200.1
200.1
0
201.8
202.2
201.4
201.3
199.5
200.1
200.1
11 Mem. poudres, 23, 158 (1928).
12 F = fusil, rifle.
201.2
199.0
146
11,65
197.4
197.3
197.6
196.1
199.5
198.7
199.2
199 5
198.2
198.2
295
196.0
1923
147.8
200.6
2005
201.0
199.2
347
147J!
1983
20tt0
1983
199.2
198.9
200.9
199.4
1059
1595
.. .
...
.. 172.9
. 198.2
. . 201.0
2002
197.6 ....
....
2267 3935
. . ....
185.7
.... 173.0