In this report a short overview is given of the instabilities that may occur during extrusion of a polymer. For the so—called spurt phenomenon a model is discussed that makes use of the JSO constitutive equation. It is shown that this model lead to a differential-algebraic-integral equation. The structure of the the equations is sketched in terms of time scales. For the stability analysis a new method is proposed that is based on discretization of the integral equation. This approximation reduces the model to a set of (singularly perturbed) ODEs, which can be analysed with standard methods.
|Title of host publication||Progress in Industrial Mathematics|
|Editors||A.M. Capasso Canile, A. Greco|
|Publication status||Published - 2002|
|Event||ECMI 2000 - |
Duration: 15 Jun 2002 → 16 Jun 2002
|Period||15/06/02 → 16/06/02|