Effect of Reactive Diluents on Photosensitivity of Si-containing Hybrid UV-Curing System

The photosensitivity of hybrid UV curing system composed of Si containing polyurethane acrylate oligomer ISAE and epoxy compounds was amplified and the value of photosensitivity was 218 5 mJ/cm 2 when the weight ratio of triethyleneglycol diacrylic ester(TEGDA) to ISAE was 1∶2. N Vinylpyrrolidone(NVP),the reactive diluent with tert amino group,decreased photosensitivity of the hybrid systems and the values of photosensitivity were more than 1980 mJ/cm 2.Photosensitivity and gel yield of hybrid system were increased by adding the mixture of cationic reactive diluents EPON-812 and ERL-4221,and the value of photosensitivity of hybrid system dropped to 105 6 mJ/cm 2.