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Pomacle, France

Agach M.,Route de Bazancourt | Agach M.,University of Lille Nord de France | Agach M.,Lille University of Science and Technology | Delbaere S.,University of Lille Nord de France | And 4 more authors.
Polymer Degradation and Stability | Year: 2012

Branched oligoesters, based on glycerol and bio-sourced succinic acid, with various controllable sizes and topologies are prepared without solvent nor catalyst and investigated using a modified A 2+B 3 approach (A 2+B'B 2). They are characterized by quantitative 13C NMR (topology and size), acid values (esterification advancement) and size exclusion chromatography (size). Modified mathematical models based on Frey relations are proposed to determine the DPn and the average number of dendritic units per molecule (DN) of the synthesized oligoesters and other oligoesters and polyesters. Biodegradability and stability of the oligomers in bulk at various temperatures and in solution at various concentrations, pH and temperatures are reported. This study underlines the relative impacts of pH, concentration, temperature, formulation and topology on the stability of non-ecotoxic readily biodegradable branched oligoesters. © 2012 Elsevier Ltd. All rights reserved. Source


Agach M.,Route de Bazancourt | Agach M.,University of Lille Nord de France | Agach M.,Lille University of Science and Technology | Delbaere S.,University of Lille Nord de France | And 4 more authors.
Colloids and Surfaces A: Physicochemical and Engineering Aspects | Year: 2013

Fully bio-sourced lauroyl oligoester surfactants, based on poly(glycerol-succinate) as polar head group with controllable sizes and topologies were prepared without solvent nor catalyst using A2+B'B2+AR and A2+B'B2+B'BR synthesis approaches. The alkyl chain was either derived from lauric acid or from glycerol α-monolaurate. The oligoester surfactants were characterized by quantitative 13C NMR, acid values and size exclusion chromatography. Their surface activity, foamability, foam stability, wetting power, solubilization properties and biodegradability were investigated proving their potential use in a wide set of applications in replacement of petrochemical surfactants. This study underlines the relative impacts of the succinic acid/glycerol monomer ratios and of the strategies of synthesis on the physico-chemical behaviour, on the biodegradability and on the stability of the lauroyl poly(glycerol-succinate) surfactants. © 2012 Elsevier B.V.. Source


Agach M.,Route de Bazancourt | Agach M.,University of Lille Nord de France | Agach M.,Lille University of Science and Technology | Moity L.,University of Lille Nord de France | And 6 more authors.
Journal of Surfactants and Detergents | Year: 2014

Anionic surfactants comprising succinic acid end groups were synthesized by succinylation of non-ionic surfactants using succinic anhydride as a potentially bio-sourced building block. A solvent- and catalyst-free synthesis was designed for succinic anhydride mono esterification with octyl-, decyl and dodecylpolyxylosides, di- and tetraethylene glycol dodecylethers and glycerol monolaurate. The physicochemical and functional properties of anionic surfactants thus obtained were studied and compared with their non-succinylated counterparts. A correlation between these properties and the polarity changes induced by the addition of the hydrophilic succinic acid moiety was established. The biodegradability of the succinylated surfactants has also been investigated. Finally, through a desirability function approach, mathematic predictions were correlated to the properties in order to find an optimum and to discriminate surfactants with respect to targeted physicochemical properties and resulting applications. © 2013 AOCS. Source

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