Burn Rate Study on Alliant (Green Dot) Smokeless Shotgun Powder and Kclo4

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Burn rate study on Alliant (Green dot) smokeless shotgun powder and KClO4

Shalom AJ Cohen
Philadelphia community college
11/2010

Abstract: The purpose of this project is to measure if differing amounts of potassium perchlorate, KCIO4, mixed with shotgun powder has an effect on burn rate. The experiment was videotaped and the duration of burn time for each amount used was recorded. KClO4, amounts ranging from .2g to 2g, were added to 4g of shotgun powder. A steel pipe that is ½ inch wide and 6 inch, which is welded vertically to a steel plate base was used for confinement. Ignition occurred from the top down. The hypothesis that was accepted is that the concentration of KClO4 will accelerate the burn rate of smokeless flake powder.

Introduction: Most shotgun powder is mixed to have sufficient oxygen to burn well. This experiment explored the results of adding additional oxidizer to the shotgun powder and igniting the mixture. The theory is addition of even more oxygen would cause the burn rate to accelerate. KClO4 is an oxidizer, a compound that readily transfers oxygen atoms and releases these atoms when heated. KClO4 is used in many flash powder compositions due to its abundance of oxygen and relative stability (Kubota, 2002). Smokeless powders, or propellants, are essentially mixtures of chemicals designed to burn under controlled conditions at the proper rate to propel a projectile from a gun. The energy released from double-base smokeless powders is derived from both nitrocellulose and nitroglycerin. The particular brand used in this experiment is Alliant, Green Dot double-base smokeless flake powder. All smokeless powders are extremely flammable; by design, they are intended to burn rapidly and vigorously when ignited. Oxygen from the air is not necessary for the combustion of smokeless powders since they contain sufficient built-in oxygen to burn

completely, (Kosanke, B.J. et al., 2004) when ignited in an unconfined state, smokeless powder...
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