Preparation and Characterization of Corn Oil Alkyd Resin Polymer under the Influence of a Catalyst and Study of its Polymerization Kinetics

Abstract

This work involved the preparation of the polymer (alkyd resin) in two steps: the first was the preparation of monoglyceride (MG) by glycerolysis method through the reaction of glycerin and corn oil using (Pb3O4) as a catalyst at temperature of 150 °C. The second, was by condensation polymerization of the alkyd resin by polymerizing the MG prepared from the first step with a dicarboxylic acid (succinic acid (SA) in this case) in the presence of a catalyst (CaCO3) and over a range of temperatures. ˚C (210, 200, 190, 180, 170). The prepared polymer was studied and characterized using Infrared spectroscopy. Adhesiveness tests of the prepared polymers showed their solubility in water and other organic solvents, and that upon evaporation, their adhesion properties were restored. This makes these polymers potentially usable in various industries, such as the dye and paint industries. Using water as a solvent is economically superior to other organic solvents. The kinetics of polymerization reactions were studied by tracking the decrease in the acid value (AV) and the amount of water removed from the reaction medium. The energy of activation (Ea) and the parameter frequency coefficient (A) had also calculated by Arrhenius equation. The energy of activation depends on the decrease in AV found to be (Ea= -9.0456 kJ) and that depends on the amount of water removed is -8.1992 kJ . The thermodynamic functions ΔH, ΔS, and ΔG were also calculated.