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A comparative study of ultraviolet and electron beam irradiation on acrylate coatings

Radiation curing is the polymerization of a chemical system which is initiated by ultraviolet (UV) or electron beam (EB) irradiation. The curing, the transformation from a liquid into a non-tacky solid, is very fast and occurs in less than one second. In this work, the optimum irradiation time on curing urethane acrylate coating by using UV and the best cured dose by using EB irradiation was studied. Coating formulations were prepared by physical mixing of aliphatic urethane acrylate (AUA) and tripropylene glycol diacrylate (TPGDA) at different ratio (60:40), (70:30), and (80:20) to choose the optimum concentration. Cured coating films were characterized by Fourier transform spectroscopy (FTIR), and swelling properties. The wood surface that cured by UV or EB were tested for their end use performance properties like pencil hardness, adhesion, bending, chemical resistance, steam resistance, stain resistance, and cigarette burn resistance test. superior results and excellent mechanical performance of acrylate films on the surface of wood induced by EB were found compared with those induced by UV irradiation.