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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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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ali, M. A. |
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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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Bilge, Kaan
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Topics
Publications (8/8 displayed)
- 2024Stiffness of In-Situ Formed Interleaving Polymeric Nanofiber-Epoxy Nanocompositescitations
- 2024Morphological adaptation of expanded vermiculite in polylactic acid and polypropylene matrices for superior thermoplastic compositescitations
- 2020Blends of highly branched and linear poly(arylene ether sulfone)scitations
- 2018Poly(propylene)/waste vulcanized ethylene- propylene-diene monomer (PP/WEPDM) blends prepared by high-shear thermo-kinetic mixer
- 2017Synergistic role of in-situ crosslinkable electrospun nanofiber/epoxy nanocomposite interlayers for superior laminated compositescitations
- 2017High strain rate response of nanofiber interlayered structural compositescitations
- 2012Structural composites hybridized with epoxy compatible polymer/MWCNT nanofibrous interlayerscitations
- 2012Structural composites hybridized with epoxy compatible polymer/MWCNT nanofibrous interlayerscitations
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article
Morphological adaptation of expanded vermiculite in polylactic acid and polypropylene matrices for superior thermoplastic composites
Abstract
<jats:title>Abstract</jats:title><jats:sec><jats:label /><jats:p>The morphological transformation of expanded vermiculite (VC) during injection molding with brittle PLA and ductile PP polymers along with its positive and negative contribution to mechanical response is investigated. Polymer/VC mixtures with 30 wt. % VC are prepared by thermokinetic high shear mixing at 4000 rpm without any ex‐situ exfoliation agents or compatibilizers. Obtained composite mixtures are then injection molded onto three‐point bending and tensile test specimens. Performed mechanical tests suggested a significant increase in tensile (110%) and flexural modulus (112%) of PP30VC samples. Presented fractographic and morphological investigations suggested that the root cause of measured improved tensile (36%) and bending strength (26%) of PP is the fibrillation of VC associated with PP/VC interactions under high shear. A similarly increasing trend for tensile (147%) and bending modulus (137%) was observed for PLA30VC samples. Contrary to PP30VC, a decreasing pattern was present in the case of tensile (−40%) and bending strength (−13%) of PLA30VC. The root cause for such reduction is determined to be (i) in situ exfoliation of VC inside PLA matrix and transformation of VC into micrometer‐sized platelets; (ii) evaporation of trapped water/crystalline water in the interlayer region of VC which caused in situ degradation of PLA during manufacturing.</jats:p></jats:sec><jats:sec><jats:title>Highlights</jats:title><jats:p><jats:list list-type="bullet"> <jats:list-item><jats:p>Vermiculite‐loaded PP and PLA composites are produced at high shear.</jats:p></jats:list-item> <jats:list-item><jats:p>Composites have superior modulus compared to neat polymers.</jats:p></jats:list-item> <jats:list-item><jats:p>Fibrillation of platelet vermiculite is observed in only the PP matrix.</jats:p></jats:list-item> </jats:list></jats:p></jats:sec>