Figure 2From: Non-adiabatic heating of polymer films under drawingSchematic of the neck propagation. The origin of the moving coordinate system is placed in the transition zone region between the neck and non-oriented part of the sample. V, the cross-head speed; dx, the length of the sample element; Δx, the length of the transition zone; u, the speed of non-oriented part of the sample; V + u, the speed of the neck.Back to article page