tane (TNCO) particles before and after their contact with liquid nitro esters were studied by differential scan-
ning calorimetry and small-angle X-ray scattering. The thermophysical properties of TNCO changed after con-
tact with nitro esters, and the temperature range of the transition from the
to 
polymorph broadened. This peculiarity was explained in terms of the fracton theory by changes in the heat capacity of particles related to
the formation of nanoscale roughness with a fractal (scale-invariant) organization as a result of surface etching
by solvents such as nitro esters, which are thermodynamically “bad” with respect to TNCO. The volume prop-
erties of particles did not change. The possibility of determining the fractal dimension of the surface of TNCO
particles by differential scanning calorimetry was demonstrated. The rate of heating was then used as a “scale
ruler” (“yardstick”), and the temperature range of the transition from the
to polymorph, as a measured parameter. The dimension of the surface fractal was also determined by an independent method (small-angle
X-ray scattering). The results obtained by the two methods were closely similar.