Erratum: Nonisothermal condition in past melt extension experiments

We point out, based on confirmation from in situ IR thermal imaging measurements of the sample temperature, that many previous studies of melt extension behavior of polymer melts were not carried out under isothermal condition. Our estimates show considerable temperature rises during the fast melt stretching that produces rather high tensile stress at appreciable Hencky rates, where air convection is not sufficient to maintain the prescribed temperatures. (C) 2015 The Society of Rheology.