The investigation of the shear-induced crystallization of isotactic polypropylene in isothermal conditions in different shear regimes is the aim of the present research. A multiscale framework is developed and implemented to compute the nucleation and growth of spherulites, based on material parameters needed to connect crystallization kinetics to the molecular material properties. The framework consists of a macro-model based on a Finite Element Method linked to a micro-model based on Cellular Automata. The main results are the evolution of the crystallization degree and spherulite space filling as a function of imposed temperature ash shear rate.
Crystallization of isotactic polypropylene in different shear regimes / Spina, Roberto; Spekowius, Marcel; Hopmann, Christian. - STAMPA. - 1892:(2017). (Intervento presentato al convegno 20th International ESAFORM Conference on Material Forming, ESAFORM 2017 tenutosi a Dublin, Ireland nel April 26-28, 2017) [10.1063/1.5008073].
Crystallization of isotactic polypropylene in different shear regimes
Spina, Roberto
;
2017-01-01
Abstract
The investigation of the shear-induced crystallization of isotactic polypropylene in isothermal conditions in different shear regimes is the aim of the present research. A multiscale framework is developed and implemented to compute the nucleation and growth of spherulites, based on material parameters needed to connect crystallization kinetics to the molecular material properties. The framework consists of a macro-model based on a Finite Element Method linked to a micro-model based on Cellular Automata. The main results are the evolution of the crystallization degree and spherulite space filling as a function of imposed temperature ash shear rate.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
