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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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| Petrov, R. H. | Madrid |
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| Rančić, M. |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Rougier, Valentin
École Polytechnique Fédérale de Lausanne
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (5/5 displayed)
- 2025Influence of Growth Location and Extraction Method on the Properties of Cameroonian <i>Musa acuminata</i> Leaf Vein Fibers
- 2024Enhancing the mechanical performance of composite corners through microstructural optimization and geometrical design
- 2024Enabling simultaneous reprocessability and fire protection via incorporation of phosphine oxide monomer in epoxy vitrimercitations
- 2023Recyclable flame retardant phosphonated epoxy based thermosets enabled via a reactive approachcitations
- 2021Modeling the impregnation of multiscale fibrous media : morphology, wetting and permeability
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article
Enabling simultaneous reprocessability and fire protection via incorporation of phosphine oxide monomer in epoxy vitrimer
Abstract
The conception of epoxy thermosets with both reprocessability and flame retardancy delineates a new horizon in polymer science, offering a material solution that is not only superior in fire safety but is also environment friendly. Herein, a flame-retardant epoxy vitrimer (EV) was prepared using partially bio-based IADPPO (diphenylphosphine oxide itaconic anhydride) and citric acid as curing reagents via a solvent-free process. Their incorporation created covalent adaptable networks (CANs) in the matrix which promote reprocessability and recyclability. The EV exhibits excellent thermal stability with high initial decomposition temperature ( T - 5wt% ∼308°C) and high glass transition temperature ( T g ∼107°C), similar to the blank EV (115°C). The flame retardancy, mechanical properties, transesterification-based reprocessability, and flame-retardant mechanism were investigated. The EV containing 3 wt% phosphorus (EV IADPPO 3P) achieved UL-94 V0 classification with a limiting oxygen index (LOI) of 27 %, while the virgin sample Blank EV (without phosphorus) burned completely. Additionally, increased flexural strength of 79 % was observed for EV IADPPO 3P compared to Blank EV. Furthermore, the flame-retardant EV showed high malleability and reparability that could be thermomechanically reprocessed without sacrificing the thermal, mechanical, and flame-retardant properties. Thus, the newly developed epoxy vitrimer is not only fire-safe but fulfills the sustainability goals of today's society.