Characterization and properties of UV-curable polyurethane-acrylate/silica hybrid materials prepared by the sol-gel process

摘要

UV-curable, transparent hybrid material of urethane-acrylate resin was prepared by the sol-gel process using 3-(trimethoxysilyl)propylmethacrylate (TMSPM) as a coupling agent between the organic and inorganic phases. The effects of the content of acid and silica on the morphology and mechanical properties of UV-curable polyurethane-acrylate/silica hybrid (UA-TMSPM)/SiO2 materials have been studied. The results of thermogravimetric analysis for the (UA-TMSPM)/SiO2 hybrid materials indicated that the thermal stability of the hybrids is greatly improved. It was found that with the increase of HCI content, the interfacial interaction between organic and inorganic phases had been strengthened, as demonstrated by field emission scanning electron microscopy. Without sacrificing flexibility, the hybrid materials showed improved hardness with increasing content of acid and silica. Compared with the pure organic counterpart UA/hexanediol diacrylate (UA/HDDA) system, abrasion resistance of the hybrids improved with increasing acid content, at low silica content. (C) 2004 Society of Chemical Industry.