Study on Silicone Modified UV-Moisture Dual Curable Polyurethane-Acrylate

A silicone modified polyurethane-acrylate(Si-PUA) prepolymer was prepared from 2-hydroxyethyl methacrylate, isophorone diisocyanate, and bis\[3-(triethoxysilyl)propyl\]amine. The Si-PUA prepolymer (exhibits) the behavior of Bingham fluids. The polydispersity of the prepolymer was 1.12 by GPC. The curing behavior of the Si-PUA prepolymer was investigated by FTIR and photo-DSC(DPC), tne it was found that the conversion of acrylate double bonds was 56.3% under ultraviolet irradation. The properties of the UV-cured and moisture-cured films were studied by TG and other measurements, and it was found that the UV-cured films were superior to the moisture-cured ones in electrical, physical properties and thermal stability.