Rheological Model of Materials for 3D Printing by Material Extrusion

Abstract

In this chapter, the viscoelastic model of Maxwell and Kevin-Voigt and the rheo-logical model are described. The operation and characteristic equations of a capillary rheometer are explained, as well as the Bagley and Rabinowitch corrections. Next, the method used to determine the viscosity of semicrystalline polymer is explained, using the capillary rheometer. Finally, the Rabinowitch is explained to define a rheological model that determines the viscosity of materials using a capillary rheometer.