References of "Detrembleur, Christophe"
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See detailPolyolefin matrixes with permanent antibacterial activity: preparation, antibacterial activity, and action mode of the active species
Lenoir, Sandrine; Pagnoulle, Christophe; Galleni, Moreno ULg et al

Poster (2008, May 22)

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See detailKey role of metal-coordination in cobalt mediated radical polymerization
Debuigne, Antoine ULg; Poli, Rinaldo; Jérôme, Christine ULg et al

Poster (2008, May 22)

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See detailLow viscosity allophanates containing actinically curable groups
Detrembleur, Christophe ULg; Weikard, Jan; Greszta-Franz, Dorota et al

Patent (2008)

A process for preparing binders containing allophanate groups which contain, at the oxygen atom of the allophanate group that is bonded via two single bonds, organic radicals with activated groups capable ... [more ▼]

A process for preparing binders containing allophanate groups which contain, at the oxygen atom of the allophanate group that is bonded via two single bonds, organic radicals with activated groups capable of participating in a polymerization reaction with ethylenically unsaturated compounds on exposure to actinic radiation; the process includes reacting A) one or more compounds containing uretdione groups with B) one or more OH-functional compounds which contain groups capable of participating in a polymerization reaction with ethylenically unsaturated compounds on exposure to actinic radiation, and C) optionally further NCO-reactive compounds, and D) in the presence of one or more compounds containing phenoxide groups, as catalysts.; The binders can be used in preparing coatings, coating materials, coating compositions, adhesives, printing inks, casting resins, dental compounds, sizes, photoresists, stereolithography systems, resins for composite materials and sealants. [less ▲]

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See detailSynthesis of novel well-defined poly(vinyl acetate)-b-poly(acrylonitrile) and derivatized water-soluble poly(vinyl alcohol)-b-poly(acrylic acid) block copolymers by cobalt-mediated radical polymerization
Debuigne, Antoine ULg; Warnant, Jérôme; Jérôme, Robert ULg et al

in Macromolecules (2008), 41(7), 2353-2360

Poly(vinyl acetate)−Co(acac)2 macroinitiators, prepared by cobalt-mediated radical polymerization of vinyl acetate (VAc), were used to synthesize well-defined poly(vinyl acetate)-b-poly(acrylonitrile ... [more ▼]

Poly(vinyl acetate)−Co(acac)2 macroinitiators, prepared by cobalt-mediated radical polymerization of vinyl acetate (VAc), were used to synthesize well-defined poly(vinyl acetate)-b-poly(acrylonitrile) (PVAc-b-PAN) block copolymers. Different solvents and temperatures were tested for the polymerization of the acrylonitrile segment by cobalt-mediated radical polymerization (CMRP), and copolymers with low polydispersity were obtained provided that dimethylformamide was used as solvent at 0 °C. The mechanism of control was assumed to change from a degenerative chain transfer mechanism for the VAc polymerization to a reversible-termination process for the AN polymerization. The hydrolysis of the ester groups of the PVAc block and the nitrile groups of the PAN sequence of the copolymer by potassium hydroxide in an ethanol/water mixture provided the double hydrophilic and pH-responsive poly(vinyl alcohol)-b-poly(acrylic acid) block copolymer. Finally, the pH responsiveness of these copolymers was demonstrated by DLS pH titration with formation of aggregates at pH < 3. [less ▲]

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See detailMechanistic Insights into the Cobalt-Mediated Radical Polymerization (CMRP) of Vinyl Acetate with Cobalt(Iii) Adducts as Initiators
Debuigne, Antoine ULg; Champouret, Yohan; Jérôme, Robert ULg et al

in Chemistry : A European Journal (2008), 14(13), 4046-4059

Over the past few years, cobalt-mediated radical polymerization (CMRP) has proved efficient in controlling the radical polymerization of very reactive monomers, such as vinyl acetate (VAc). However, the ... [more ▼]

Over the past few years, cobalt-mediated radical polymerization (CMRP) has proved efficient in controlling the radical polymerization of very reactive monomers, such as vinyl acetate (VAc). However, the reason for this success and the intimate mechanism remained basically speculative. Herein, two mechanisms are shown to coexist: the reversible termination of the growing poly(vinyl acetate) chains by the Co(acac)(2) complex (acac: acetylacetonato), and a degenerative chain-transfer process. The importance of one contribution over the other strongly depends on the polymerization conditions, including complexation of cobalt by ligands, such as water and pyridine. This significant progress in the CMRP mechanism relies on the isolation and characterization of the very first cobalt adducts formed in the polymerization medium and their use as CMRP initiators. The structure proposed for these adducts was supported by DFT calculations. Beyond the control of the VAc polymerization, which is the best ever achieved by CMRP, extension to other monomers and substantial progress in macromolecular engineering are now realistic forecasts. [less ▲]

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See detailIn-Situ Nitroxide-Mediated Radical Polymerization (Nmp) Processes: Their Understanding and Optimization
Sciannamea, Valérie; Jérôme, Robert ULg; Detrembleur, Christophe ULg

in Chemical Reviews (2008), 108(3), 1104-26

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See detailAtom transfer radical polymerization of MMA with a macromolecular ligand in a fluorinated solvent and in supercritical carbon dioxide
Grignard, Bruno ULg; Jérôme, Christine ULg; Calberg, Cédric ULg et al

in European Polymer Journal (2008), 44(3), 861-871

Macromolecular fluorinated ligands were prepared according to a three-step strategy that consists of the random copolymerization of heptadecafluorodecyl acrylate and 2-hydroxyethylacrylate, followed by ... [more ▼]

Macromolecular fluorinated ligands were prepared according to a three-step strategy that consists of the random copolymerization of heptadecafluorodecyl acrylate and 2-hydroxyethylacrylate, followed by the esterification of the pendant hydroxyl groups with acryloyl chloride and the Michael-type addition of tetraethyldiethylenetriamine onto the acrylic double bonds of the polymeric chains. These fluorinated macroligands were successfully used in the atom transfer radical polymerization of MMA catalyzed by a copper salt in a fluorinated solvent. The polymerization control was analyzed in relation to the copper salt, the initiator and the molecular weight and composition of the macroligand before being extended to the heterogeneous ATRP of MMA in scCO2. [less ▲]

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See detailMetal-coordination: an effective lever for cobalt-mediated radical polymerization
Debuigne, Antoine ULg; Jérôme, Christine ULg; Jérôme, Robert ULg et al

in Polymer Preprints (2008), 49(27), 193-194

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See detailFoams of polycaprolactone/MWNT nanocomposites for efficient EMI reduction
Thomassin, Jean-Michel ULg; Pagnoulle, Christophe; Bednarz, Lukasz et al

in Journal of Materials Chemistry (2008), 18(7), 792-796

Nanocomposites of polycaprolactone (PCL) filled with multi-walled carbon nanotubes (MWNTs) were foamed by supercritical CO2 in order to prepare materials with reduced electromagnetic interference (EMI ... [more ▼]

Nanocomposites of polycaprolactone (PCL) filled with multi-walled carbon nanotubes (MWNTs) were foamed by supercritical CO2 in order to prepare materials with reduced electromagnetic interference (EMI). Two mixing techniques were used, i.e., melt blending and co-precipitation. Shielding efficiency as high as 60 to 80 dB together with a low reflectivity was observed at a very low vol% of MWNTs (0.25 vol%). The reflectivity of the nanocomposites was advantageously decreased upon foaming. The uniformity of the open-cell structure was assessed by scanning electron microscopy. These foamed PCL/MWNT nanocomposites are very promising EMI shielding materials because their performances result from absorption at low filler content and not from reflection at relatively high filler content as was previously the case. [less ▲]

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See detailSupported ATRP of fluorinated methacrylates in supercritical carbon dioxide : preparation of scCO2 soluble polymers with low catalytic residues
Grignard, Bruno ULg; Calberg, Cédric ULg; Jérôme, Christine ULg et al

in Chemical Communications (2008), (44), 5803-5805

Synthesis of poly( 2,2,2-trifluoroethyl methacrylate) by supported ATRP was investigated in supercritical carbon dioxide using a copper salt ligated to a polymeric ligand immobilised onto silica; after ... [more ▼]

Synthesis of poly( 2,2,2-trifluoroethyl methacrylate) by supported ATRP was investigated in supercritical carbon dioxide using a copper salt ligated to a polymeric ligand immobilised onto silica; after polymerisation, fluorinated polymers with well defined molecular weight and low polydispersity were obtained. [less ▲]

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See detailCopper bromide complexed by fluorinated macroligands: towards microspheres by ATRP of vinyl monomers in scCO2
Grignard, Bruno ULg; Jérôme, Christine ULg; Calberg, Cédric ULg et al

in Chemical Communications (2008), (3), 314-316

We report the successful synthesis of poly(methyl methacrylate) (PMMA) by atom transfer radical polymerization using a catalyst ligated to a polymeric ligand having a dual role, i.e., the complexation of ... [more ▼]

We report the successful synthesis of poly(methyl methacrylate) (PMMA) by atom transfer radical polymerization using a catalyst ligated to a polymeric ligand having a dual role, i.e., the complexation of the copper salt and the stabilization of the growing PMMA particles; at the end of the polymerization, the catalyst is removed by supercritical fluid extraction leading to PMMA microspheres with low residual catalyst content. [less ▲]

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See detailCombination of electrografting and layer-by-layer deposition: an efficient way to tailor polymer coatings of (semi)-conductors
Charlot, Aurélia; Gabriel, Sabine ULg; Detrembleur, Christophe ULg et al

in Chemical Communications (2007), (44), 4656-4658

This communication reports on a novel, simple and highly versatile concept, which consists in combining the advantages of two complementary and relevant techniques (i) electrografting and (ii) layer-by ... [more ▼]

This communication reports on a novel, simple and highly versatile concept, which consists in combining the advantages of two complementary and relevant techniques (i) electrografting and (ii) layer-by-layer deposition process with the goal to tailor strongly adhering coatings to (semi)-conducting surfaces imparting them with tunable specific properties. [less ▲]

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See detailBeneficial effect of carbon nanotubes on the performances of Nafion membranes in fuel cell applications
Thomassin, Jean-Michel ULg; Kollar, Jozef; Caldarella, Giuseppe ULg et al

in Journal of Membrane Science (2007), 303(1-2), 252-257

Multi-walled carbon nanotubes (MWCNTs) were dispersed by melt-extrusion within Nafion(R) membranes in order to decrease the methanol permeability without deleterious effect on the ionic conductivity. The ... [more ▼]

Multi-walled carbon nanotubes (MWCNTs) were dispersed by melt-extrusion within Nafion(R) membranes in order to decrease the methanol permeability without deleterious effect on the ionic conductivity. The risk of short-circuits was minimized by keeping the carbon nanotubes content lower than the percolation threshold. Two series of carbon nanotubes grafted by carboxylic acid groups were used, i.e., commercially available carbon nanotubes and MWCNTs home-grafted by carboxylic acid containing alkyl radicals. The second series of nanotubes were more resistant to break-up during melt-processing. Methanol permeability was decreased by approximately 60% without any decrease in the ionic conductivity. In parallel, the Young's modulus was increased by 140% and 160% as compared to pure Nafion(R) at MWCNT contents of 1 and 2 wt%, respectively. [less ▲]

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