All ten prepared samples were tested at frequencies of dynamic mechanical loading of 0.5 Hz, 1 Hz, 2 Hz, 5 Hz and 10 Hz, with a constant stress value of 0.1 MPa, constant stress rate of 0.1 Hz and an amplitude of sinusoidal loading of 20 µm, over the entire temperature range of the TPU service life from 146 K up to 527 K, at a constant heating rate of 3 K·min−1.