BURNING BEHAVIOR OF COMPOSITE PROPELLANT CONTAINING FINE POROUS AMMONIUM-PERCHLORATE

A fine porous ammonium perchlorate (FPAP) was prepared by the spray-dr ying method. The burning behavior of a propellant containing FPAP was investigated and compared with that of a propellant containing a fine ammonium perchlorate without porosity (FAP), of which the mean diamete r was almost the same as that of FPAP. The results are as follows: (1) The burning rate of the propellant containing FPAP increases with inc reasing FPAP content. (2) When the propellants containing FPAP or FAP have the same composition, the burning rate of the propellant containi ng FPAP is larger than that of the propellant containing FAP at variou s pressures. (3) The temperature sensitivity of a propellant containin g FAP is relatively constant at various pressures. However the tempera ture sensitivity of the propellant containing FPAP decreases with incr easing pressure. (4) It was found that the differences in the burning behavior of the propellant containing FPAP and the propellant containi ng FAP are caused by the porosity of FPAP.