Detonation of mononitrobenzene and propargyl alcohol at reduced pressure is
recorded for the first time in 10-mm-diameter steel tubes with a wall thic
kness of 13 mm with high-power initiation. The detonation velocities of nit
robenzene equal 25-50% of the ideal value obtained from thermodynamic calcu
lations. The conditions for stationary detonation propagation are examined
and the critical porosities for these materials are computed based on calcu
lations of the fraction of material that is heated and burnt up during deto
nation. The computations are in good agreement with experiment.