Chimie Moléculaire, Macromoléculaire et Matériaux (C3M)

Cross-Linking Vitrimers after Melt Processing Using Supramolecularly Masked Dynamic Cross-Linkers

Thomas Aubineau — 2024-09-25T08:01:30Z

G. J. M. Formon, J. Jayaratnam, C. Guibert, N. J. Van Zee, R. Nicolaÿ Macromol. 2024, 57, 8277–8286, https://doi.org/10.1021/acs.macromol.4c01363
Vitrimers are permanent polymer networks with dynamic covalent bonds that allow them to be reshaped and recycled. Although they are often promoted as an ideal class of materials situated between thermosets and thermoplastics, vitrimers are usually far more difficult to process than thermoplastics because their melt viscosity gradually decreases (…)

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Shear-induced phase behavior of bidisperse jammed suspensions of soft particles

Thomas Aubineau — 2024-09-25T08:02:57Z

R. Alrashdan, H. K. Yankan, M. Cloître, F. Khabaz Physics of Fluids 2024, 36, 073333, https://doi.org/10.1063/5.0216758
Particle dynamics simulations are used to determine the shear-induced microstructure and rheology of jammed suspensions of soft particles. These suspensions, known as soft particle glasses (SPGs), have an amorphous structure at rest but transform into ordered phases in strong shear flow when the particle size distribution is relatively monodisperse. Here, a series of (…)

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Iron-catalyzed Light-driven Decarboxylative Alkoxyamination

Thomas Aubineau — 2024-09-25T08:03:54Z

M. Innocent, C. Tanguy, S. Gavelle, T. Aubineau, A. Guérinot
Chem. Eur. J. 2024, 30, e20241252, https://doi.org/10.1002/chem.202401252
An iron-catalyzed, visible-light induced decarboxylative alkoxyamination of carboxylic acids with TEMPO is disclosed. In the presence of FeBr2 and TEMPO, a large array of carboxylic acids including marketed drugs and biobased molecules is turned into the corresponding alkoxyamine derivatives. The versatility of the latter offers an entry towards molecular (…)

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Triblock copolymers, comprising cyclic anhydride moieties, acting as reactive re-processing enhancers for polyamides

Gaelle CarrÃ© de Lusancay — 2025-10-08T06:26:29Z

Matylda Szewczyk-Łagodzińska, Violette Mohring, Sebastian Kowalczyk, Natalia Grochowska, Hanna Krawczyk, Piotr Wieciński, Nathan J. Van Zee, Renaud Nicolaÿ, Andrzej Plichta Polymer Volume 332 2025, 128568 https://doi.org/10.1016/j.polymer.2025.128568
Abstract Carbonate- and ether-based oligodiols have been converted into macro-RAFT agents via ATRAF reactions. They have been utilized in RAFT polymerization of styrene and maleic anhydride (MA) to obtain triblock copolymers (TBCs) with (…)

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Synthesis of 2-(Trifluoromethyl)Azetidines by Strain-Release Reactions of 2-(Trifluoromethyl)-1-Azabicyclo[1.1.0]Butanes

A. Scuiller, A. Dupas, G. Lefebvre, N. Bouriche, H. Chédotal, G. Guillamot, J. Cossy, C. Meyer
Chem. Eur. J. 2025, 31, e202500590
https://doi.org/10.1002/chem.202500590
Substituted azetidines are privileged heterocyclic scaffolds in medicinal chemistry and have become synthetic targets of high interest in recent years. With the goal of developing a new access to azetidines incorporating the pharmaceutically relevant trifluoromethyl group, the reactivity of (…)

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Stress distributions in soft particle glasses: Insights from a thermodynamic model

Minaspi Bantawa ; Paolo Edera ; Michel Cloitre ; Roger T. Bonnecaze J. Rheol. 69, 2025, 611–620 https://doi.org/10.1122/8.0000921
Jammed suspensions of soft particle glasses (SPGs) exhibit intriguing rheological response under different shear flows, such as stress overshoot in start-up shear and Herschel–Bulkley behavior in steady shear. However, the fundamental link between microscopic processes and macroscopic (bulk) behavior remains elusive. To address this, we employ large-scale 3D (…)

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