Sylvie Pourchet

Sylvie Pourchet
University of Burgundy | UB · Institut de Chimie Moléculaire de l’Université de Bourgogne (ICMUB)

PhD

About

33
Publications
5,114
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
966
Citations

Publications

Publications (33)
Chapter
As multifunctional aromatic molecule, eugenol is one of the most appropriate bioresources to develop new bio-based flame-retardant polymers. This chapter mainly deals with the use of eugenol as reactive monomer and its functionalization with phosphorus and silicon moieties to prepare different kinds of partially bio-based flame-retardant polymers,...
Article
Full-text available
This work explores the use of supercritical carbon dioxide (sc-CO2) conditions as an innovative and environmentally friendly treatment of plant fibres to optimize their performance for integration into composite materials. This study evaluates, in particular, the influence of this treatment on the mechanical, thermal, hygroscopic properties and bio...
Article
Full-text available
Epoxy resin plays a key role in composite matrices and DGEBA is the major precursor used. With the aim of favouring the use of bio resources, epoxy resins can be prepared from lignin. In particular, diglycidyl ether of isoeugenol derivatives are good candidates for the replacement of DGEBA. This article presents an effective and eco-friendly way to...
Article
A bio-based reactive phosphate flame retardant derived from iso-eugenol was synthesized and fully characterized (1H,13C,31P NMR, FTIR, MS) with the aim of improving flame retardancy behavior of bio-based epoxy thermosets. This new green flame retardant, diepoxy-iso-eugenol phenylphosphate (DEpiEPP) was then copolymerized either with conventional di...
Article
Biobased diepoxy synthons derived from isoeugenol, eugenol or resorcinol (DGE-isoEu, DGE-Eu and DGER, respectively) have been used as epoxy monomers in replacement of the diglycidyl ether of bisphenol A (DGEBA). Their curing with six different biobased anhydride hardeners leads to fully biobased epoxy thermosets. These materials exhibit interesting...
Article
Full-text available
The diep-oxy monomer, C13H16O4 {DGE-Eu; systematic name: 2-[3-meth-oxy-4-(oxiran-2-ylmeth-oxy)benz-yl]oxirane}, was synthesized from eugenol by a three-step reaction. It consists of a 1,2,4-tris-ubstituted benzene ring substituted by diglycidyl ether, a meth-oxy group and a methyl-oxirane group. The three-membered oxirane rings are inclined to the...
Article
The reaction of N,N,N′,N′-tetramethyl guanidine, NHC(N(CH3)2)2 (TMGD) and CdBr2·4H2O in ethanol led to the formation of [TMGDH][CdBr3] (1), which crystallizes in the monoclinic space group Cc with Z=4, a=8.9079(7) Å, b=18.5810(14) Å, c=8.1637(6) Å, β=107.953(3)°, and V=1285.44(17) ų. In the crystal lattice, 1 is organized in one-dimensional anioni...
Article
A novel lignin-based synthon, diglycidylether of iso-eugenol (DGE-isoEu) is used as a prepolymer for the preparation of thermosetting resins. DGE-isoEu is synthesized in a two-step procedure with a satisfactory yield from bio-based iso-Eugenol (isoEu, 2-Methoxy-4-(1-propenyl)phenol) catalytically fragmented from lignin in an organosolv process. DGE...
Article
An effective preparation of new tailor-made macromolecular materials via a combination of two (atom-efficient) catalytic transformations is reported. First, new aliphatic polyesters with alternated composition have been prepared using a salen aluminum catalyst system. Next, the pendant vinyl moieties in those copolymers have been selectively transf...
Article
An undecylenic acid-based monoglyceride prepared from glycidol and undecylenic acid is used as suitable and tunable synthon for polymerization applications. Epoxidation and acrylation reactions lead to photopolymerizable monomers while transesterification with dimethyl carbonate, metathesis and aminolysis reactions provide access to polyhydroxyuret...
Article
Superplasticizers and especially polycarboxylate grafted polyethylene oxide (PCE) demonstrated their efficiency to fluidify concrete. The aim of this work is to investigate the evolution of the fluidity as a function of adsorption in a sulfated solution with a wide variety of comb-like superplasticizers and at incomplete adsorption rate. Polymers w...
Article
Early C3A–CaSO4 hydration was studied in the presence of various amounts of two polycarboxylate ether superplasticizers differing in their grafting degree. Hydration and surface area developments were investigated by in-situ NMR relaxometry coupled with BET and DSC during the first 2 h after mixing. This study enables a quantitative comparison of t...
Article
Nowadays admixtures and especially superplasticizers are unavoidable components of the concrete formulation. The high fluidizing efficiency of the comb-like superplasticizers must not overshadow their high costs. This study aims to determine the PCE structure parameters which influence their adsorption in order to enhance their resistance to sulfat...
Article
Calcite suspensions are used to mimic the behavior of more complex cementitious systems. Therefore the characterization of calcite–water interface in strong alkaline conditions, through ionic adsorption, electrokinetic measurements, static rheology and atomic force microscopy is a prerequisite. Calcium, a potential determining ion for calcite, adso...
Article
We studied how the repartition of the negatively charged groups/PEG side chains along the polycarboxylate comb-like copolymers influences the dispersant behavior of these comb copolymers. Performing a RAFT copolymerization allowed providing well defined copolymers differing only in the repartition (gradient or random) of the charged groups along th...
Article
Full-text available
Hydration leads to hydrated phases precipitation which are more or less covered by the adsorbed admixture depending on the added amount and the nature of the surface. To predict the optimum dosage and to understand the fluidity evolution at the early age, it is interesting to study the specific surface area development of cement during this period....
Article
Hydration reactions of C3A with various amounts of calcium sulfate hemihydrate, gypsum or a mixture of two, were investigated by isothermal microcalorimetry, and a monitoring of the ionic concentrations of diluted suspensions. This study shows that sulfate type used modifies the early C3A-CaSO4 hydration products and the rate of this hydration. The...
Article
Full-text available
The influence of polycarboxylate superplasticizers with variations of content of anionic groups was studied on pure tricalcium silicate hydration. The hydration in diluted suspension has been investigated by conductimetry, calorimetry, and ionic and total organic carbon analysis of the liquid phase. The tricalcium silicate hydration is always delay...
Article
Full-text available
Different types of superplasticizers have been widely used over the past few decades in order to produce a more fluid or very high strength and durable concrete. These chemical admixtures interfere with the various physico-chemical processes occurring in early cement paste. In this paper we present results from a study on the influence of superplas...
Article
Full-text available
The interaction mechanism between polycarboxylate-type superplasticizer (PCP) and cement hydration is not fully understood and incompatibilities between concrete and additive are sometimes observed. In some cases, the fluidity tends to increase (“overfluidification”) few minutes after mixing. This is a problem because the overfluidification leds to...
Article
Concrete and mortars are porous composite materials resulting of a mix of cement, aggregates and water. Addition of an organic additive, currently used as grinding aid (Triisopropanolamine named TIPA), generates a mechanical strength increase of concrete and mortars with respect to samples hydrated without additive. The physico-chemical study we ha...
Article
Synopsis: Several superplasticisers were synthesised by an esterification reaction using commercial polymethacrylic acid and polyethylene oxide chains to produce comb-type polymers. These superplasticisers, with same main chain length, but different ester ratios were evaluated in self-compacting concrete (SCC) using cement with a high C3A and solub...
Article
New double-chain zwitterionic surfactants were shown to undergo spontaneous dispersion as vesicles in water by means of simple dilution of the lamellar phase. The molecular parameters of relevance were investigated in a systematic study of the structure of the lamellar phase and of the ability of spontaneous formation of vesicles in a series of hom...
Article
Interfacial properties of zwitterionic surfactants having polymethylene intercharge arms of different length have been studied. Critical micelle concentration values, area per molecule, and surface tension values are all consistent with the following picture of the surfactant film: molecular interactions inside the interfacial film are electrostati...
Article
Résumé : Afin d'améliorer principalement les propriétés d'adhésion, les industries développent des mortiers-colles contenant des poudres de latex. Les interactions physico-chimiques entre les phases cimentaires et les billes de latex sont encore mal comprises. Dans le but de comprendre l'agencement structurel de ce système complexe qui conduit à la...

Network

Cited By