| 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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Van Den Brande, Niko
Vrije Universiteit Brussel
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (43/43 displayed)
- 2024Construction of furan-maleimide Diels-Alder reversible network cure diagrams: modelling and experimental validation
- 2024Effects of Cure on the Ionic Conductivity and Relaxation Strength of a Reversible Polymer Network Studied by Dielectric Spectroscopy.citations
- 2024Diels-Alder Network Blends as Self-Healing Encapsulants for Liquid Metal-Based Stretchable Electronicscitations
- 2024Modelling of diffusion-controlled Diels-Alder reversible network formation and its application to cure diagrams
- 2023Separating Kinetics from Relaxation Dynamics in Reactive Soft Matter by Dielectric Spectroscopycitations
- 2023Real-Time Determination of the Glass Transition Temperature during Reversible Network Formation Based on Furan–Maleimide Diels–Alder Cycloadditions Using Dielectric Spectroscopycitations
- 2022A PDTPQx:PC61BM blend with pronounced charge-transfer absorption for organic resonant cavity photodetectors – direct arylation polymerization vs. Stille polycondensationcitations
- 2022A PDTPQx:PC61BM blend with pronounced charge-transfer absorption for organic resonant cavity photodetectors – direct arylation polymerization vs. Stille polycondensationcitations
- 2022UV Stability of Self-Healing Poly(methacrylate) Network Layerscitations
- 2021Phosphonium-based polythiophene conjugated polyelectrolytes with different surfactant counterions: thermal properties, self-assembly and photovoltaic performancescitations
- 2020UV-curable self-healing polymer layers for application in photovoltaics
- 2020Phosphonium‐based polythiophene conjugated polyelectrolytes with different surfactant counterions: thermal properties, self‐assembly and photovoltaic performancescitations
- 2020Self-Healing in Mobility-Restricted Conditions Maintaining Mechanical Robustness: Furan–Maleimide Diels–Alder Cycloadditions in Polymer Networks for Ambient Applicationscitations
- 2020Phosphonium-based polythiopheneconjugated polyelectrolytes with differentsurfactant counterions: thermal properties,self-assembly and photovoltaic performancescitations
- 2020Phosphonium-based polythiophene conjugated polyelectrolytes with different surfactant counterions: thermal properties, self-assembly and photovoltaic performances
- 2020Comparative study on the effects of alkylsilyl and alkylthio side chains on the performance of fullerene and non-fullerene polymer solar cellscitations
- 2020Comparative study on the effects of alkylsilyl and alkylthio side chains on the performance of fullerene and non-fullerene polymer solar cellscitations
- 2020Self-healing UV-curable polymer network with reversible Diels-Alder bonds for applications in ambient conditionscitations
- 2019Diffusion- and Mobility-Controlled Self-Healing Polymer Networks with Dynamic Covalent Bondingcitations
- 2019Increasing photovoltaic module sustainability through UV-curable self-healing polymer layers
- 2019UV-curable self-healing polymer layers for increased sustainability of photovoltaics
- 2019Ladder-type high gap conjugated polymers based on indacenodithieno[3,2-b]thiophene and bithiazole for organic photovoltaicscitations
- 2018The Effect of Vitrification on the Diels-Alder Reaction Kinetics
- 2018Glass Structure Controls Crystal Polymorph Selection in Vapor-Deposited Films of 4,4 '-Bis(N-carbazolyI)-1,1 '-biphenylcitations
- 2017Probing the bulk heterojunction morphology in thermally annealed active layers for polymer solar cellscitations
- 2016High-Permittivity Conjugated Polyelectrolyte Interlayers for High-Performance Bulk Heterojunction Organic Solar Cellscitations
- 2016Elucidating Batch-to-Batch Variation Caused by Homocoupled Side Products in Solution-Processable Organic Solar Cellscitations
- 2016Thermal behaviour below and inside the glass transition region of a submicron P3HT layer studied by fast scanning chip calorimetrycitations
- 2015Isothermal Crystallization of PC61BM in Thin Layers Far below the Glass Transition Temperaturecitations
- 2015Effect of molecular weight on morphology and photovoltaic properties in P3HT:PCBM solar cellscitations
- 2015Effect of molecular weight on morphology and photovoltaic properties in P3HT:PCBM solar cells
- 2013Imidazolium-substituted ionic (co)polythiophenes: Compositional influence on solution behavior and thermal propertiescitations
- 2013Imidazolium-substituted ionic (co)polythiophenes: Compositional influence on solution behavior and thermal properties
- 2012Analysing organic solar cell blends at thousands of degrees per second
- 2012Improved Photovoltaic Performance of a Semicrystalline Narrow Bandgap Copolymer Based on 4H-Cyclopenta[2,1-b:3,4-b ']dithiophene Donor and Thiazolo[5,4-d]thiazole Acceptor Unitscitations
- 2012Improved Photovoltaic Performance of a Semicrystalline Narrow Bandgap Copolymer Based on 4H-Cyclopenta[2,1-b:3,4-b ']dithiophene Donor and Thiazolo[5,4-d]thiazole Acceptor Units
- 2012Crystallization Kinetics and Morphology Relations on Thermally Annealed Bulk Heterojunction Solar Cell Blends Studied by Rapid Heat Cool Calorimetry (RHC)
- 2011Improving The Dispersion Of Carbon Nanotubes In Polystyrene By Blending With Siloxane
- 2011Thermal annealing of P3HT: PCBM blends for photovoltaic studies
- 2011Partially miscible polystyrene/ polymethylphenylsiloxane blends for nanocomposites
- 2011Thermal Annealing of P3HT: PCBM Organic Photovoltaic Blends
- 2011Isothermal crystallisation study of P3HT:PCBM blends as used in bulk heterojunction solar cells based on fast scanning calorimetry techniques
- 2010Isothermal crystallization kinetics of P3HT:PCBM blends by means of RHC
Places of action
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article
Effects of Cure on the Ionic Conductivity and Relaxation Strength of a Reversible Polymer Network Studied by Dielectric Spectroscopy.
Abstract
This study employs broadband dielectric spectroscopy (BDS) to investigate the cure kinetics and chemical equilibria of a Diels-Alder (DA) reversible network. Focusing on segmental dynamics, the α-relaxation and ionic conductivity are studied during heating and subsequent cooling right after isothermal precuring at 55 °C. During first heating, the glass transition temperature ( T g ) shows a systematic, stepwise upshift from -35 °C to 46 °C, manifesting both increasing conversion and the shift of the ratio between endo- to exo-cycloadducts. Upon cooling, all experiments yield T g values around 40 °C indicating partial depolymerization, which is confirmed by kinetic model simulations. Ionic conductivity analysis, employing the Debye-Stokes-Einstein relation, confirms charge transport assisted by segmental motions with partial decoupling of the α-relaxation time from ionic conductivity (fractional DSE behavior) between T g and T g ×1.2. Surprisingly, the degree of coupling, given by the FDSE exponent S , drops until reaching the gel point (~30 min.) with no further changes upon extended cure. In contrast, a continuous increase in dc-conductivity with curing time is observed, attributed to enhanced intrinsic conductivity via improved H-bonding. Investigation of the α-relaxation strength and shape reveals subtle trends, reflecting changes in the dipole-dipole correlation and equilibrium shifts between cycloadducts. This work offers insights into the glass transition dynamics in reversible polymeric networks and might provide a basis for similar studies in systems undergoing chemical or physical transformations.