Kinetic Studies of Esterification of Rosin and Pentaerythritol

Esterification of rosin with pentaerythritol produces ester (RPE) which is widely used in paint, coating, and pressure-sensitive hot-melt adhesive industries. Although RPE has excellent valuable applications been industrially produced, studies on the reaction kinetics have not reported present literature. This work proposed a kinetic study synthesis by including series consecutive reactions forming mono-, di-, tri-, tetra-ester decarboxylation as side model. For esterification, rates were determined second-order The first-order order was for decarboxylation. Kinetic experiments performed at temperature range 260 °C to 290 °C. initial molar ratio (in mole OH/COOH) between 0.8 1.2. A small amount samples withdrawn certain time interval. sample analyzed evaluate their acid saponification number. Afterward, those experimental data simulate validate In general, model could capture well. resulting activation energies ranged from 65.81 129.13 kJ mol−1 esterification 233.00 also offers new insight that correlates well formation softening point.