이소시아네이토 아크릴레이트를 이용한 다관능성 폴리우레탄 아크릴레이트의 합성과 물성

Abstract

Polyurethane is used in various fields because it can be designed with a wide range of physical properties. So polyurethane has become a familiar material. However, the polyurethane industry has been pointed out to environmental problems and human health hazards. This is because Volatile Organic Compounds (VOCs) are emitted not only in the production stage but also in the final products. To solve this problem, a method of using a reactive monomer and using an ultraviolet (UV) curing has been used to limit the use of an organic solvent. Polyurethane production by photocuring is more efficient in terms of time and cost, and its physical properties are better than those of thermosetting polyurethane products. Therefore, photocurable polyurethane acrylate has been developed and applied in the coating and printing industries. In this study, we have synthesized and analyzed the multi-functional polyurethane acrylate which has efficient photocuring efficiency even in the solid phase. polyurethane acrylate was synthesized by using ethylene diamine (EDA) as a chain extender in poly (ε-caprolactone) polyol (PCL polyol) and 4,4'-diisocyanatedicyclohexylmethane (H12MDI). Isocyanato acrylate (ICA), a new isocyanate compound, was added to 5, 10 and 20% of H12MDI. As a result of photocuring the synthesized samples, the tensile strength was increased before and after photocuring in samples with high ICA content, while the elongation was decreased. In addition, thermal stability and Tg tended to increase with increasing ICA content. As a result, the use of a compound having an acrylate group such as ICA makes it possible to freely design polyurethane acrylate molecules. This result will allow the polyurethane market to expand into more diverse industries.