Video Clip Lecture #13 "Rheology of Melts at constant (T-Tg)

Description
Video Clip Lecture #13: describes the formulation of rheology at constant free volume, i.e. at constant (T-Tg) instead of classically done constant T. We show in this lecture that the classical formulae of rheology (Maxwell at low w, 3.4 exponent for the molecular weight dependence of viscosity, are in fact modified if one works at constant (T-Tg(w)). We re-construct the curves at constant free volume from frequency curves obtained under isothermal conditions. This is the video clip of a power point already part of the content available on this site.