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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:56 |
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Conference: Bucharest University Faculty of Physics 2021 Meeting
Section: Polymer Physics
Title:
Simulation of the crystallization process of polymeric films
Authors:
Catalin BERLIC (1), Emil-Stefan BARNA (1), Cristina MIRON (1), Valentin BARNA (1)
Affiliation:
1) University of Bucharest, Faculty of Physics, 405 Atomistilor Street, 077125, Magurele, Romania
E-mail
cataliniulian.berlic@g.unibuc.ro
Keywords:
polymer, crystallization, instantaneous nucleation, sporadic nucleation, Avrami equation, polymeric films
Abstract:
Polymeric film crystallization is a special type of polymer crystallization because the confined geometry drastically modifies the kinetics of crystallization and lead to complex behaviour that is difficult to study. We investigated the isothermal crystallization process in polymeric films using computer simulations. Both instantaneous and sporadic nucleation processes were investigated, finding some similarities with the bulk crystallization process. In that sense, we devised two special programs that simulate polymer crystallization in polymeric films. The analysis of the results allowed the determination of the overall crystallization rate and the Avrami index as they are defined by the Avrami equation valid for the volume crystallization. For both regimes, the values of the Avrami parameters are significantly influenced by the growth velocity that is more important as the thickness of the film decreases. We also found that the instantaneous nucleation in the polymeric film is more influenced by the film nucleation regime than the sporadic nucleation.
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