Thien VuongNguyenabPhuongNguyen -TricSohrabAzizidTran ChienDangeDuc MinhHoangfThu HaHoanggThi LinhNguyenhThuy Thi LeBuihViet HungDangiNgọc LinhNguyenjThe TamLekThi Ngoc LinhNguyenlQuoc TrungVumDai LamTranabThi My LinhDangbLe TrongLuab
In this study, the kinetic of photopolymerization reaction, mechanical properties and the morphology of UV curable acrylate urethane coating were investigated. Coatings consisting of 2 wt.% of tinuvin 384, R-TiO2, A-TiO2 and ZnO were fabricated. Loading of 2 wt.% of Tinuvin 384 organic UV absorbent was found to decrease the conversion of acrylate double bonds, gel fraction, relative hardness and abrasion resistance of the coating. R-TiO2 nanoparticles showed insignificant impact on the conversion of acrylate double bonds but improved mechanical properties of the coating. A-TiO2 and ZnO enhanced both the conversion of acrylate double bonds and mechanical properties of the coatings. A mechanism of photopolymerization reaction of UV-curable acrylate urethane coating in the presence of inorganic UV absorbents has proposed. Nanoparticles were dispersed well in a polymer matrix, with a size of about 50−200 nm.