Dynamics of capillary breakup of elastic jets

The tensile stress of threads appearing in the capillary breakup of jets of high-molecular polymeric solutions with concentrations of 0.003-0.03% is measured. As a stress sensor, the droplets adjacent to the thread were used. The forces acting on the threads are found. It is shown that, under the stretching, the rheologic behavior of the liquid in the thread differs from that in the conditions of contractile flow in the droplet. The inertial effects in the thinning of the threads between the jet droplets are analyzed.