SYNTHESIS AND PROPERTIES OF ACRYLATED EPOXIDIZED PALM OIL FOR UV CURED COATINGS

Abstract

Radiation curing technology using palm oil as a raw material has encountered increasing applications in recent years. An acrylated epoxidized palm oil (AEPO) was synthesized from epoxidized palm oil (EPO) using acrylic acid as a ring opening agent. FTIR and 1H-NMR spectra were performed to confirm the formation of acrylate grafting on the fatty acid chain. The AEPO was mixed with four different amounts of photoinitiators using Irgacure 500. Glass substrate surfaces were coated with the resin formulations, subsequently cured under UV light and the coating adhesion were characterized. AEPO vinyl functional group appeared at 1624 cm-1, CH2=CH-COO and also at absorption band of 961cm-1, =C-H. In 1H NMR, the acrylate group CH=CH2 introduced resonate around at δ5.8-6.5 ppm. The increased in viscosity of AEPO, 497.5 Cps was confirmed by appearance of peak at 3417cm-1 in FTIR. In the preparation of AEPO films in UV curing adhesive, AEPO 2wt% have the highest surface hardness. The AEPO 2wt% has the highest gel content whereas the AEPO 2.5wt% had the lowest gel content.