Effect of Processing Variables on the 'Internal Slip Flow' of a Triple Base Gun Propellant Dough

摘要

The rheological behavior of triple base gun propellant doughs of N and NQ types was measured with an extrusion rheometer at temperatures of 20C, 30C and 45C, using slit and capillary dies. The propellant doughs were made from two grades of nitrocellulose, and from picrite obtained from two sources. Acetone/water mixtures and acetone/ethanol mixtures were used as processing solvents. Most of the processing variables had little effect on flow behavior. It as found that a type of internal slip occurred in the dough at a shear stress of about 60 kPa. and this had a significant effect on flow behavior. Australia. (AW)