SYNTHESIS AND CHARACTERIZATION OF SOME MODIFIED EPOXY RESINS WITH FATTY ACIDS

Abstract

Some modified epoxy resins were prepared from the reaction of epoxy resin with some fatty acids (palmitic acid, stearic acid, oleic acid)in the presence of paratoluene Sulfonic acid at low temperature ranging between 70,90C◦ and at high temperature ranging between 280,300C◦. All the epoxy modifiers were characterized by IR and acid value AV. The mechanical properties (Hardness, Impact strength, Elongation, Tensile strength) and thermal stability (TGA) were studied. The mechanical properties of modified are lower than unmodified polymers, but Oleic acid was the best of all. The thermal stability was decreased according to below (Stearic acid> Palmatic acid>Oleic. acid).