Fatty Acid Methyl Esters as Biosolvents of Epoxy Resins: A Physicochemical Study

Yaocihuatl Medina-Gonzalez (1) , Pascale de Caro (1) , Sophie Thiebaud-Roux (1) , Corinne Lacaze-Dufaure (2)

1 CAI - Chimie Agro-Industrielle
2 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

The C8 to C18 fatty acid methyl esters (FAME) have been compared as solvents for two epoxy resin pre-polymers, bisphenol A diglycidyl ether (DGEBA) and triglycidyl paminophenol ether (TGPA). It was found that the solubilization limits vary according to the ester and that methyl caprylate is the best solvent of both resins. To explain these solubility performances, physical and chemical properties of FAME were studied, such as the Hansen parameters, viscosity, binary diffusion coefficient and vaporization enthalpy. Determination of the physicochemical parameters of FAME was carried out by laboratory experimentations and by calculation from bibliographic data. The Hansen parameters of FAME and epoxy resins pre-polymers were theoretically and experimentally determined. The FAME chain length showed a long dependence on the binary diffusion parameters and kinematic viscosity, which are mass and momentum transport properties. Moreover, the vaporization enthalpy of these compounds was directly correlated with the solubilization limits.

Mots clés: Biosolvents; FAME; Epoxy; Resins; Surface cleaning; Physicochemical parameters; Hansen parameters; Dipole moment

Domaines: Matériaux

Yaocihuatl Medina-Gonzalez, Pascale de Caro, Sophie Thiebaud-Roux, Corinne Lacaze-Dufaure. Fatty Acid Methyl Esters as Biosolvents of Epoxy Resins: A Physicochemical Study. Journal of Solution Chemistry, 2007, 36 (4), pp.437-446. ⟨10.1007/s10953-007-9126-5⟩. ⟨hal-03592755⟩