Shock compression data for liquids. III. Substituted methane compounds, ethylene glycol, glycerol, and ammonia

Abstract

Hugoniot data are presented for the liquid forms of the substituted methanes—dichloromethane, dibromomethane, di-iodomethane, and chloroform—ethylene glycol, glycerol, and ammonia. High explosive techniques were used to cover the range of dynamic pressures of 0.7 to 82.0 GPa. Chloroform transforms to a new form at 25.0 GPa pressure. Di-iodomethane data indicate a low pressure transition at 2.3 GPa and a second transition at a pressure greater than 66.0 GPa. The shock velocity–particle velocity (Us–Up) data for these two liquids are best represented by a linear relationship over the various forms. The Us–Up data for dichloromethane, dibromomethane, ethylene glycol, and glycerol are best fit by a quadratic expression in Up. Ammonia Us–Up data fit a linear relationship. Only dibromonethane and ammonia Us–Up curves extrapolate to the known sound speed. The others intercept at values that are 13% to 33% higher than the measured sound speed, indicative of low pressure transitions.