A5003118253- Advanced Polymer Synthesis and Characterization
- biodegradable polymer synthesis and properties
- Synthetic Organic Chemistry Methods
- Organometallic Complex Synthesis and Catalysis
- Polymer Surface Interaction Studies
- Radioactive element chemistry and processing
- Surfactants and Colloidal Systems
- Dendrimers and Hyperbranched Polymers
- Carbon dioxide utilization in catalysis
- Polymer crystallization and properties
- Pickering emulsions and particle stabilization
- Advanced Cellulose Research Studies
- Innovative Microfluidic and Catalytic Techniques Innovation
- Luminescence and Fluorescent Materials
- Polymer composites and self-healing
- Polymer Science and PVC
- Photopolymerization techniques and applications
- Mass Spectrometry Techniques and Applications
- Chemical Synthesis and Analysis
- Synthesis and properties of polymers
- Analytical Chemistry and Chromatography
- Machine Learning in Materials Science
- Polymer Nanocomposites and Properties
- Molecular Junctions and Nanostructures
- Surface Modification and Superhydrophobicity
École d'Ingénieurs en Chimie et Sciences du Numérique
2016-2025
Catalyse
2008-2025
Centre National de la Recherche Scientifique
2015-2024
Université Claude Bernard Lyon 1
2015-2024
Institut de Chimie et Biochimie Moléculaires et Supramoléculaires
2022-2024
Michelin (France)
2022-2024
Centre National pour la Recherche Scientifique et Technique (CNRST)
2024
Laboratoire de Chimie
2011-2020
Forum Réfugiés - Cosi
2015-2019
Canadian Nautical Research Society
2018-2019
This Perspective describes the recent developments of polymerization-induced self-assembly amphiphilic block copolymers based on controlled/living free-radical polymerization (CRP) in water. method relies use a hydrophilic living polymer precursor prepared via CRP that is extended with hydrophobic second an aqueous environment. The process thus leads to self-assemble situ into self-stabilized nano-objects frame emulsion or dispersion process. Depending nature and structure so-formed...
A hydrophilic poly(methacrylic acid-co-poly(ethylene oxide) methyl ether methacrylate) copolymer with a trithiocarbonate reactive group was used in the free-radical, batch emulsion polymerization of styrene. It allowed fast polymerizations and high final conversions to be achieved, parameters for good control over formation well-defined amphiphilic diblock copolymers were identified. These self-assembled situ into nano-objects various morphologies upon chain extension. Achieving formed shown...
The emulsion polymerization of styrene in the presence hydrophilic poly(methacrylic acid-co-poly(ethylene oxide) methyl ether methacrylate), P(MAA-co-PEOMA), macromolecular RAFT (reversible addition–fragmentation chain transfer) agents possessing a trithiocarbonate reactive group and 19 ethylene oxide subunits grafts was performed to create situ P(MAA-co-PEOMA)-b-polystyrene amphiphilic block copolymer self-assemblies. system studied using following conditions: pH 5, two different...
The reversible addition–fragmentation chain transfer (RAFT) polymerization of acrylic acid (AA) in water was studied detail at different pHs using 4-cyano-4-thiothiopropylsulfanyl pentanoic (CTPPA) as a control agent and 4,4′-azobis(4-cyanopentanoic acid) (ACPA) an initiator. Well-defined hydrophilic macromolecular RAFT agents (PAA-CTPPA) were obtained further used directly for the styrene. corresponding polymerization-induced self-assembly (PISA) process evaluated it shown that working...
Biomolecule−polymer conjugates are widely used in bio-related fields, but their synthesis is often tricky, especially the introduction of a single biomolecule at one chain end. This paper describes new straightforward approach to prepare such via RAFT polymerization. By designing appropriate agents, polymer chains controlled length (Mn = 10 000−40 000 and PDI < 1.1) carrying as an α-end group (a sugar or biotin) linked by stable amide bond obtained. Considering versatility process, this...
The RAFT-mediated emulsion polymerization of styrene was carried out in a one-pot, two-step procedure using two poly(methacrylic acid-co-poly(ethylene oxide) methyl ether methacrylate) macroRAFT agents different compositions carrying reactive trithiocarbonate end-group. latter were prepared situ, directly aqueous solution at acid pH. In all cases, the synthesis fast and efficient, leading to very high conversions good control over polymer features. It moreover particularly reproducible,...
The present paper describes the successful one-pot synthesis of self-stabilized particles composed amphiphilic block copolymers based on poly(methacrylic acid) (PMAA) obtained by polymerization-induced self-assembly. First, controlled radical polymerization MAA is performed in water using RAFT process taking advantage our recent results showing [ChaducMacromolecules 2012, 45, 1241−1247]. so-formed hydrophilic macroRAFT agents are then chain-extended situ with a hydrophobic monomer to form...
Abstract Polymerization‐induced self‐assembly (PISA) was employed to compare the of different amphiphilic block copolymers. They were obtained by emulsion polymerization styrene in water using hydrophilic poly( N ‐acryloylmorpholine) (PNAM)‐based macromolecular RAFT agents with structures. An average three poly (ethylene glycol acrylate) (PEGA) units introduced either at beginning, statistically, or end a PNAM backbone, resulting formation nanometric vesicles and spheres from two former...
In simulations and experiments, we study the drying of films containing mixtures large small colloidal particles in water. During drying, mixture stratifies into a layer larger at bottom with smaller on top. We developed model to show that gradient osmotic pressure, which develops dynamically during is responsible for segregation mechanism behind stratification.
Abstract The syntheses of amphiphilic block copolymers are successfully performed in water by chain extension hydrophilic macromolecules with styrene at 80 °C. employed strategy is a one‐pot procedure which poly(acrylic acid), poly(methacrylic acid) or acid‐ co ‐poly(ethylene oxide) methyl ether methacrylate) macroRAFTs first formed using 4‐cyano‐4‐thiothiopropylsulfanyl pentanoic acid (CTPPA) as transfer agent. resulting then directly used without further purification for the RAFT...
Abstract The present paper reports the first example of a controlled radical polymerization ethylene using reversible addition–fragmentation chain transfer (RAFT) in presence xanthates (Alkyl‐OC(S)S‐R) as controlling agents under relative mild conditions (70 °C, <200 bars). specific reactivity produced alkyl‐type propagating radicals induces side fragmentation reaction stabilizing O ‐alkyl Z group agents. This fragmentation, rarely observed RAFT, was proven by NMR analyses. In addition,...
Abstract The year 2020 marks the 100th anniversary of first article on polymerization, published by Hermann Staudinger. It is Staudinger who realized that polymers consist long chains covalently linked building blocks. Polymers have had a tremendous impact society ever since this initial publication. People live in world almost impossible to imagine without synthetic polymers. But what does future hold for polymer science? In article, editors and advisory board Macromolecular Chemistry...
Abstract Aqueous emulsion copolymerizations of dibenzo[c,e]oxepane‐5‐thione (DOT) were performed with n ‐butyl acrylate (BA), styrene (S) and a combination both. In all cases, stable latexes obtained in less than two hours under conventional conditions; that is the presence sodium dodecyl sulfate (SDS) used as surfactant potassium persulfate (KPS) initiator. A limited solubility DOT BA was observed compared to S, yielding more homogeneous integration units PS latex. both copolymer could be...
Poly(N-acryloylmorpholine) (PNAM)-decorated waterborne nanoparticles comprising a core of either degradable polystyrene (PS) or poly(n-butyl acrylate) (PBA) were synthesized by polymerization-induced self-assembly (PISA) in water. A PNAM bearing trithiocarbonate chain end (PNAM-TTC) was extended via reversible addition-fragmentation transfer (RAFT)-mediated emulsion copolymerization styrene (S) n-butyl acrylate (BA) with dibenzo[c,e]oxepane-5-thione (DOT). Well-defined amphiphilic block...
A means to an end: Polyethylene chains obtained by catalyzed chain growth on magnesium and exhibiting molar masses up 5000 g mol−1 have been end-functionalized in high yield with iodide, azide, amine reactive end groups (see scheme). The functionalized polyethylenes can be used generate a range of polyolefins; for example, the azide-functionalized undergo "click" reactions afford macromonomers. Detailed facts importance specialist readers are published as "Supporting Information". Such...
The incorporation of functional groups at the end polyolefin chains offers an opportunity to prepare building blocks. latter can be used construct polymer architectures based on polyolefins with many desirable properties. For this purpose, reactivity carbon-metal bond formed during a catalytic olefin polymerization process is particularly appealing. possibility taking advantage has indeed been enhanced by discovery systems in which fast and reversible chain transfer reactions between active...
Water-soluble macroalkoxyamines are shown to be particularly well-suited initiators for nitroxide-mediated emulsion polymerization. They lead the synthesis of amphiphilic block copolymers that self-assemble in situ into well-defined nanoobject morphologies, agreement with principles polymerization-induced micellization. Depending on molar mass hydrophobic block, formed nanoparticles hairy spherical micelles, nanofibers, or vesicles. The nanofibers most intriguing and spectacular structure...
Poly(ethylene oxide) (PEO) based macroRAFT agents with various chemical structures have been used as both stabilizer and control agent for the polymerization of styrene in miniemulsion conditions. Trithiocarbonate (PEO-DTTC (Z = thiododecyl), PEO-PTTC thiopropyl)) functional groups were attached to a commercial monomethyl ether PEO (Mn 2000 g mol−1). PEO-DTTC allowed formation stable miniemulsions water. Our previous results (A. M. Dos Santos, T. Le Bris, C. Graillat, F. D'Agosto, Lansalot,...
A functional chain transfer agent, bis(10-undecenyl)magnesium, was employed as cocatalyst in conjunction with [(C5Me5)2NdCl2Li(OEt2)2] to catalyze polyethylene (PE) growth on magnesium. Vinyl-PE-Mg-PE-vinyl units were then further functionalized. This is the first example of catalytic ethylene polymerization single-step, situ functionalization telechelic polyethylenes. As a service our authors and readers, this journal provides supporting information supplied by authors. Such materials are...
Reversible addition–fragmentation chain transfer (RAFT) polymerization of methacrylic acid was successfully performed in water the presence a trithiocarbonate, 4-cyano-4-thiothiopropylsulfanylpentanoic (CTPPA), as RAFT agent. Several parameters such temperature, concentration, pH, targeted degree, and initiator concentration were studied. For pH value below pKa MAA, well-defined PMAA chains with different molar mass up to 92 000 g mol–1 exhibiting low dispersity (Đ < 1.19) obtained under...