Tough, UV-curable Polyurethane-based Resins for Digital Light Processing 3D Printing
발표자
()
초록
내용
Majority of photocurable resins for 3D printing consist of acrylate-based monomers, attributable to fast photopolymerization rate and relatively good storage stability. However, high toughness is one of the properties highly deficient for 3D printed objects, owing to the inherent shortage of physical bondings in acrylate-based resin. In order to overcome this limitation, we newly synthesized polyurethane-based acrylate resin, which includes polyurethane placed in the main backbone, in attempt to grant the both elasticity and the rigidity. In this presentation, urethane pre-polymer was synthesized by adjusting the molecular weight and mole ratio of polyol and isocyanate, and polyurethane acrylate was finally synthesized by utilizing 2-hydroxyethyl acrylate (HEA) as an end capping agent. We measured mechanical properties with 3D printed specimens. Addition of polyurethane with varying mole ratio and various compositions significantly enhances the impact strength of 3D printed objects.