Abstract:The photosensitive ink with two-stage curing and 3D printing elastomer was synthesized by using double-curing system design. The polyurethane prepolymer was blocked with methyl-acetone oxime, and the optimal unsealed temperature was determined to be 120 ℃ by FT-IR and DSC. Different acrylate diluents were used to prepare the photocurable P resin part, and the T resin composed of blocked polyurethane prepolymer and chain extender was configured with a double curing system of photocurable 3D printing ink. A flat plate rheometer was used to determine that the printing temperature should be controlled at 30~35 ℃. The mechanical properties of the samples after curing were tested, and it is found that when the diluted monomer with high glass transition temperature is used as diluent, the mechanical properties of the prepared samples are the best, close to those of the poured polyurethane elastomer and could maintain good elasticity at room temperature.