Numerical simulation of phase field model for spherulite growth of semi-crystalline polymers using FD-FV-LB method

Li, Qiang; Qu, Fangcao; Jiang, Tao

doi:10.1016/j.camwa.2023.03.006

Cited by 2 publications

(1 citation statement)

References 34 publications

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“…It was experimentally validated using the interface distribution function. [197][198][199] Good agreement was found for both the iPP samples regarding the average lamellar thickness and the distribution's full-width half maximum (FWHM). This confirms that the Lauritzen-Hoffman equation can be used under the cooling conditions applied in that study, despite the absence of isothermal conditions in time and position.…”

Section: The Prediction Of Mechanical Performance Of Isotactic Polypr...mentioning

confidence: 91%

Evolution of the Deformation‐ and Flow‐Induced Crystallization and Characterization of the Microstructure of a Single Spherulite, Lamella, and Chain of Isotactic Polypropylene

Sharaf,

Kloczkowski

2023

Macro Chemistry & Physics

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Isotactic polypropylene (iPP) is a frequently used polymer in industrial processing and scientific research, used as a model material. This review highlights some current and forefront issues in polymer science and engineering. This review alludes to classical deformation schemes to interpret the complicated deformation in isotactic polypropylene as a semicrystalline polymer. Also, due to the complex hierarchical structures of crystallized polymers, we are concerned mainly with the progress on the multi‐scale and multi‐stage microstructural evolution covering each deformation stage from the initiation of plasticity until failure, particularly in terms of crystalline morphology changes. Specifically, the characterization of the microstructure evolution of a single spherulite, lamella, and chain of isotactic polypropylene will be emphasized and mentioned. Here, we are most interested in the results obtained from stretching (strain‐induced) orientation and crystallization studies accompanied by the in situ scattering and spectroscopy techniques offering a detection window from nano to micrometer scale, which should be able to reflect the microstructural changes at different length scales of interest.During polymer processing, the melts are frequently subjected to shear or/and elongation flow fields, producing flow‐induced molecular chain orientation in the melt. The oriented molecular chains crystallize differently than those encountered under quiescent conditions. Thus, orientation‐induced crystallization has long been an object of intense interest. A vast body of research was reported about the effects of preorientation on the crystallization of various polymers. Among them, iPP is most frequently studied since its diversified structure and morphology are very sensitive to changes in processing conditions and molecular parameters.This article is protected by copyright. All rights reserved

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Section: The Prediction Of Mechanical Performance Of Isotactic Polypr...mentioning

confidence: 91%

Evolution of the Deformation‐ and Flow‐Induced Crystallization and Characterization of the Microstructure of a Single Spherulite, Lamella, and Chain of Isotactic Polypropylene

Sharaf,

Kloczkowski

2023

Macro Chemistry & Physics

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Numerical simulation of macroscopic viscoelastic melt filling and mesoscopic spherulite growth

Wan,

Li,

2024

Journal of Polymer Engineering

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In this work, a non-isothermal viscoelastic computational framework is proposed for macroscopic polymer melt filling and mesoscopic spherulite growth. Firstly, the macroscopic viscoelastic governing equation is solved by coupled level set immersed boundary and finite-volume (LS-IB-FV) method. The melt-air interface is captured by the coupled level-set and volume-of-fluid (CLSVOF) method. And the mesoscopic crystallization behavior is predicted by the phase field model. Then, the numerical simulation for melt filling process is compared with experimental one to validate the coupled method. And it is simulated that the melt filling stage in a complex annular cavity with 17 small solid discs for the semi-crystalline polymer of isotactic polystyrene, and it is studied that the impacts of three different injection velocities on the flow modes, temperature distribution and solidified layers. Finally, in the regions of solidified layers, the growth of spherulites is simulated with/without melt flows at two different points. Numerical results show that the injection velocities can affect the flow modes and temperature distribution significantly. The morphology of polymer spherulite that is consistent with the experimental result can be observed clearly. With flow fields, the spherulites grow faster and densely towards the upstream direction.

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Numerical simulation of phase field model for spherulite growth of semi-crystalline polymers using FD-FV-LB method

Cited by 2 publications

References 34 publications

Evolution of the Deformation‐ and Flow‐Induced Crystallization and Characterization of the Microstructure of a Single Spherulite, Lamella, and Chain of Isotactic Polypropylene

Evolution of the Deformation‐ and Flow‐Induced Crystallization and Characterization of the Microstructure of a Single Spherulite, Lamella, and Chain of Isotactic Polypropylene

Numerical simulation of macroscopic viscoelastic melt filling and mesoscopic spherulite growth

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