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The breakage of a polymer chain of segments, coupled by anharmonic bonds withapplied constant external tensile force is studied by means of MolecularDynamics simulation. We show that the mean life time of the chain becomesprogressively independent of the number of bonds as the pulling force grows.The latter affects also the rupture rates of individual bonds along the polymerbackbone manifesting the essential role of inertial effects in thefragmentation process. The role of local defects, temperature and friction inthe scission kinetics is also examined.

Polymer chain scission at constant tension - an example of force-induced collective behaviour