| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Kühnert, Ines
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024Combining Injection Molding and 3D Printing for Tailoring Polymer Material Propertiescitations
- 2023Micromechanical study on polypropylene-bicomponent fibers to improve mechanical interlocking for application in strain-hardening cement-based compositescitations
- 2021Effect of molar mass on critical specific work of flow for shear-induced crystal nucleation in poly (l-Lactic Acid)
- 2020Effect of filler synergy and cast film extrusion parameters on extrudability and direction-dependent conductivity of PVDF/carbon nanotube/carbon black compositescitations
- 2019Multi-functional powder coating materials for material bonding in metal-plastic joints ; Multifunktionale Pulverbeschichtungsmaterialien zur stoffschlüssige Anbindung in Metall-Kunststoff-Verbindungen
- 2019Synthesis and characterization of MgAl-DBS LDH/PLA composite by sonication-assisted masterbatch (SAM) melt mixing methodcitations
- 2018Substance to substance bonded metal-plastic joints by the use of latent reactive powder coatings as adhesive - Material and technology development ; Stoffschlüssige Metall-Kunststoff-Verbindungen durch Verwendung von latent-reaktiven Pulverlacken als Klebstoff - Werkstoff- und Technologieentwicklung
- 2018Prefinished Metal Polymer Hybrid Partscitations
- 2017Prefinished metal polymer hybrid parts ; Einbaufertige Hybridbauteile
- 2016Powder coating films with latent adhesive function for metal-plastic hybrids ; Pulverlacke mit latent vorhandener haftvermittelnden Funktion für Metall-Kunststoff-Verbunde
Places of action
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article
Micromechanical study on polypropylene-bicomponent fibers to improve mechanical interlocking for application in strain-hardening cement-based composites
Abstract
Polyproplylene (PP) fibers find application in strain-hardening cement-based composite to enable the formation of multiple fine cracks for high energy absorption. Often, however, the mechanical performance of such composites suffers from insufficient fiber-matrix interaction. In the research at hand, bicomponent PP single fibers with rough surfaces for improved mechanical interlocking are produced using an IPF (Leibniz-Institut für Polymerforschung Dresden e. V.), an in-house designed and built, laboratory-scale piston fiber spinning device. The melt-spun fibers consist of a shell component composed of PP and various volume percentages of different inorganic particles of calcium carbonate (CaCO3), aluminum oxide (Al2O3), and of a core component made of the same polymer as in the shell. The bicomponent fibers, with shell diameters between 20 and 45 μm, were characterized by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) to understand their morphology and to study the fiber surfaces after composite failure. Tensile strength and Young's modulus of the fibers were evaluated using tension tests. Furthermore, the single fiber pullout (SFPO) test was used to investigate the interfacial interaction between fiber and a cement-based matrix. Significant improvements in fiber-matrix bonding were achieved due to the rough surface employed in connection with the particles incorporated in the outer shell. Still further, the fiber's strength, attained using an offline step in the drawing process, contributes to enhanced energy adsorption under dynamic pullout loading. To evaluate the performance of the newly developed bicomponent fibers, they were compared to a self-spun monocomponent PP fiber and a commercial PP fiber. This comparison revealed slip-hardening induced by increasing surface roughness for enhanced mechanical interlocking and plastic polymer deformation in the fiber-matrix contact zone.