Fatty Acid Methyl Esters as Biosolvents of Epoxy Resins: A Physicochemical Study |
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Authors: | Y Medina Gonzalez P de Caro S Thiebaud-Roux C Lacaze-Dufaure |
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Institution: | (1) ENSIACET, Laboratoire de Chimie Agro-industrielle, UMR INRA/INP-ENSIACET, 118 Route de Narbonne, 31077 Toulouse Cedex 4, France;(2) ENSIACET, CIRIMAT, UMR 5085, 118 Route de Narbonne, 31077 Toulouse Cedex 4, France |
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Abstract: | 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 p-aminophenol 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. |
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Keywords: | Biosolvents FAME Epoxy Resins Surface cleaning Physicochemical parameters Hansen parameters Dipole moment |
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