Burning rate water effects

Fire Hazards - Flash Point (deg. F) 175 Flammable Limits in Air (%) Data not available Fire Extinguishing Agents Foam, dry chemical, carbon dioxide Fire Extinguishing Agents Not to be Used Water may be ineffective Special Hazards of Combustion Products Ranunable alcohol and ketone gases are formed in fires Behavior in Fire Bums with a flare effect. Containers may explode Ignition Temperature Data not available Electrical Hazard Data not available Burning Rate Data not available. 

A finished propellant block (of precisely known properties) was then cut into strands 0.25 in. square and approximately 4 in. long. All strands were inhibited by leaching in water for 10-15 sec. When the burning surface could not be made to burn straight and perpendicular to its direction of travel, the strands had to be inhibited with three coats of 5% vinyl plastic (VYLF) in dichloromethane solution in addition to leaching in water. Preliminary tests showed that this inhibition had no significant effect on the burning rate but did increase the extinction pressure from 0.045 to 0.060 atm. 

Combustion. 1) V.E. Annikov et al, Effect of Water, Ammonium Carbonate and other Additives on Combustion of Explosives , FizGoreniya-Vzryva 5 (1), 60-67 (1969) CA 71, 40905 (1969) [The authors state that the effects of w on the burning rate of Tetryl and RDX in a constant pressure bomb can be explained by the Zel dovich (1942) theory. They report that the burning rate of RDX with iO to 20% w added is higher because of strong turbulence] 2) M A. 

In this way one mole of water reacts with two moles of isocyanate. For a urethane prepolymer with an equivalent weight of about 300, it only takes 9 grams of water to effectively consume the prepolymer. This can lead not only to degraded physical properties, but it also forms gas bubbles in the proplnt which lead to voids and higher than predicted burning rates. This sensitivity to water content also exists with hydroxy-terminated polybutadiene polymers cured with... 

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