and this effect is used in the work of Mackay et al. for crosslinked PS nanoparticles and PS polymer. Although translational entropy is lost when the nanoparticles segregate to the substrate ...
This quantum effect, combined with the Second Law of Thermodynamics, which states that every physical process will lead to an increase in the total entropy, leads to the unexpected energy gain.
The cooling effect means that it is an endothermic process (D H>0) so that TD S is positive. Thus the entropy of the rubber band increases when it goes from the stretched state to the natural state.