2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/218106Recently singular solutions have been discovered in purely elongational flows of visco-elastic fluids. We surmise that these solutions are the mathematical structures underlying the so-called birefringent strands seen experimentally. In order to facilitate future experimental studies of these we derive a number of asymptotic results for the scaling of the width and extension of the near-singular structures in the FENE-P model for polymers of finite extensibility.16 pages, 8 figuresFluid Dynamicstext