  The thermally activated fracture processes in the carbon backbone of
diamond-like carbon nanothreads and the hydrogen desorption from them has been
studied by the molecular dynamics method. Specifically, the temperature
dependence of the characteristic desorption time at T = 1700-2800 K has been
determined. The activation energy and frequency factor in the Arrhenius formula
for the desorption rate are found. This allows estimating the desorption time
at any temperature. The mechanical stiffness of nanothreads is calculated.
