Application of the Folgar–Tucker model to predict the orientation of particles of different aspect ratios in polymer suspensions
-
Julian Kattinger
,
Sebastian Joas
Abstract
The increasing requirements on plastic parts demand a rising use of combined functional and reinforcing materials. Therefore, often reinforcing particles with different aspect ratios are added to the plastic as additive mixtures. However, the engineering design process of reinforced parts requires an early knowledge of the expected orientation of the reinforcing particles. Numerous models try to predict the orientation of particles in polymer suspensions. However, the interaction coefficient strongly depends on the aspect ratio of the particles and a prediction of the orientation behavior of additive mixtures with differently shaped particles has not been validated using conventional methods. In this work, the orientation of differently shaped particle mixtures in polymer suspensions is investigated for different fluid channel geometries. Finally, the Folgar–Tucker model is applied to filler mixtures and implemented into OpenFOAM®, which enables the comparison of filler orientation in different fluid channel geometries. Regarding the experiments a characteristic increase of the interaction coefficient was observed at a filling level of 5%. Furthermore, it was shown that a balanced mixing ratio yields higher interaction coefficients. With regard to the performed simulations, it was possible to show qualitatively how a considered interaction between fibers and platelets affects the orientations.
Funding source: Deutsche Forschungsgemeinschaft
Award Identifier / Grant number: 327744866
Author contributions: S. J., F.W. and J. K. performed the experimental investigations on the orientational behavior and determined the interaction coefficients. F. W. developed the new model to describe the fiber orientation of interacting particle mixtures. M. K. and C. B. contributed with discussions as well as corrections and directed the research work.
Research funding: The project is funded by Deutsche Forschungsgemeinschaft (DFG, German Research Founda-tion) – 327744866.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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- Frontmatter
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- Solid–liquid–liquid phase envelopes from temperature-scanned refractive index data
- Application of the Folgar–Tucker model to predict the orientation of particles of different aspect ratios in polymer suspensions
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Articles in the same Issue
- Frontmatter
- Material properties
- Solid–liquid–liquid phase envelopes from temperature-scanned refractive index data
- Application of the Folgar–Tucker model to predict the orientation of particles of different aspect ratios in polymer suspensions
- Investigating the relationship between tack and degree of conversion in DGEBA-based epoxy resin cured with dicyandiamide and diuron
- Synergistic effect of oxidized low-dimensional carbon nanomaterials on the properties of polysulfone composite membrane
- Investigations of the characteristics and performance of modified polyethersulfones (PES) as membrane oxygenator
- Preparation and assembly
- In vitro biocompatibility study of microwave absorbing conducting polymer blend films for biomedical applications
- Design and characterization of ramie fiber-reinforced composites with flame retardant surface layer including iron oxide and expandable graphite
- Reducing lactose content of milk from livestock and humans via lactose imprinted poly(2-hydroxyethyl methacrylate-N-methacryloyl-i-aspartic acid) cryogels
- Engineering and processing
- PVA coating of ferrite nanoparticles triggers pH-responsive release of 5-fluorouracil in cancer cells
- Miscible blend polyethersulfone/polyimide asymmetric membrane crosslinked with 1,3-diaminopropane for hydrogen separation
- Pyrolysis and combustion of polystyrene composites based on graphene oxide functionalized with 3-(methacryloyloxy)-propyltrimethoxysilane
