R. Meyer J. Köhler A. Homburg Explosives

155 Gunpowder
them from influx of water in wet boreholes. Guar gum gelled with water
produces a barrier layer, which prevents any further penetration of
water (W Water Resistance; W Slurries).
Guarnylureadinitramide
GUDN, Guarnylureadinitramide, N-Guanylharnstoffdinitramid,
FOX-12
H 2N
NH O
C
N
H
C
NH 2
* HN
white crystals
sum formula: C2H7N7O5
molecular weight: 209.12 g
energy of formation: -332 kJ/mole
enthalpy of formation: -356 kJ/mole
oxygen balance: -19.13%
volume of explosion gases 785 l/kg
heat of explosion (calculated): 2998 kJ/kg (H2O gas);
3441 kJ/kg (H2O liq.)
density: 1.75 g/cm3 specific energy: 950 kJ/kg
melting point: 215 °C
GUDN is a high explosive developed by the Swedish Defence Research
Agency FOI. It provides good thermal stability, low water
solubility and no hygroscopicty. It is used as a fuel in gas-generating
compositions, and may be used for LOVA applications.
Gunpowder
propellant; Schiesspulver; poudre
The propellant which has exclusively been used for a long time in
conventional military weapons is the smokeless (or, more accurately,
low-smoke) powder. According to its composition, it can be classified
as single-base powders (e.g., nitrocellulose powder), doublebase powders
(e.g., nitroglycerine powder) and triple-base powders (e.g., nitrocellulose
+ nitroglycerine (or diglycol dinitrate) + nitroguanidine
powders).
The main component of nitrocellulose powders is nitrocellulose, a
mixture of guncotton (13.0–13.4% nitrogen) and soluble guncotton
(11–13% nitrogen content). To manufacture the powder, the nitrocellu-
NO 2
NO 2