European Polymer Journal
European Polymer Journal
5 years ago

Effect of Flow-Induced Crystallization on the distribution of spherulite dimensions along cross section of injection molded parts.

Effect of Flow-Induced Crystallization on the distribution of spherulite dimensions along cross section of injection molded parts.
Two injection molding tests conducted on an isotactic polypropylene were used as case studies to validate the predictions of a software code developed at the University of Salerno (UNISA Code) which is able to describe the evolution of the main process variables while considering the evolution of crystallinity and morphology. The results of the simulation and the comparison with experimental results, allowed the clarification of some unexpected behaviors of the experimental data. In particular, by considering the effect of flow on crystallization kinetics (Flow Induced Crystallization – FIC) the software was able to describe the presence of smaller spherulites at the midplane of the molded part, whose presence cannot be explained if quiescent crystallization kinetics is adopted.

Publisher URL: www.sciencedirect.com/science

DOI: S0014305717311618

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