Presentazioni e Articoli Tecnici

The manufacturing of high quality injection molded parts requires a deep understanding of material properties, process parameters and product design. The behavior of a polymer during the injection molding process and the performance of the final part are strongly determined by the material structure formed during filling and cooling. The main objective of the presented work is to describe the crystallization kinetics of semi-crystalline thermoplastics with a multiscale model implemented into COMSOL Multiphysics®. This is done by identifying the analytical parameters needed to connect crystallization kinetics with molecular material properties and applying the analytical scheme to the numerical simulation during filling and cooling in an injection molding process. The crystallization kinetics was successfully simulated. Application to isotactic polypropylene illustrates the complexity of modeling the different material microstructures using COMSOL-SphäroSim integration.