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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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Brancart, Joost
Vrije Universiteit Brussel
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024Designing flexible and self-healing electronics using hybrid carbon black/nanoclay composites based on Diels-Alder dynamic covalent networkscitations
- 2024Diels-Alder Network Blends as Self-Healing Encapsulants for Liquid Metal-Based Stretchable Electronicscitations
- 2023Solid‐state crosslinkable, shape‐memory polyesters serving tissue engineeringcitations
- 2023Fast Self-Healing at Room Temperature in Diels–Alder Elastomerscitations
- 2023Assisted damage closure and healing in soft robots by shape memory alloy wirescitations
- 2023Vitrimeric shape memory polymer-based fingertips for adaptive graspingcitations
- 2023Effect of Secondary Particles on Self-Healing and Electromechanical Properties of Polymer Composites Based on Carbon Black and a Diels–Alder Networkcitations
- 2021Supramolecular self-healing sensor fiber composites for damage detection in piezoresistive electronic skin for soft robotscitations
- 2021The Influence of the Furan and Maleimide Stoichiometry on the Thermoreversible Diels–Alder Network Polymerizationcitations
- 2020Self-Healing Material Design and Optimization for Soft Robotic Applications
- 2019Diffusion- and Mobility-Controlled Self-Healing Polymer Networks with Dynamic Covalent Bondingcitations
- 2019Mechanical, physical and chemical characterisation of mycelium-based composites with different types of lignocellulosic substratescitations
- 2018The Effect of Vitrification on the Diels-Alder Reaction Kinetics
- 2017Towards the first developments of self-healing soft robotics
- 2011Self-healing property characterization of reversible thermoset coatings
Places of action
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article
Diffusion- and Mobility-Controlled Self-Healing Polymer Networks with Dynamic Covalent Bonding
Abstract
A systematic study of diffusion-controlled reversible Diels–Alder (DA) network formation is performed under both isothermal and nonisothermal reaction conditions based on two amorphous furan–maleimide thermoset model systems. The experimental evolution of the glass-transition temperature, Tg, with the predicted DA conversion, x, simulated by a two-equilibrium kinetic model for endo and exocycloadducts leads to the Tg–x relationship of these model systems. The heat capacity, cp, from modulated temperature differential scanning calorimetry enables the characterization of (partial) vitrification along the reaction path. In isothermal DA reactions at Tcure, a stepwise negative drop in Δcp at the onset of vitrification is observed, followed by a diffusion-controlled reaction at a reduced rate. Tg can exceed Tcure by at least 15 °C. In nonisothermal DA cure at a sufficiently low heating rate, (partial) vitrification is also possible (negative Δcp step), followed by diffusion-controlled cure until devitrification occurs again (positive Δcp). Gelation along the reaction path is proven by dynamic rheometry, and gelled glasses can always be obtained under ambient conditions. This information is of importance in the damage management of reversible thermosets by self-repair of microcracks in bulk, as evidenced by dynamic mechanical analysis of a compressed powder after healing below Tg.