The cure characteristics and tensile properties of ultraviolet (UV) curable acrylic resins were investigated as a function of cure time, and tyes and contents of photoinitiator and reactive monomer. The change of chemical structure during curing was investigated by Fourier transform infrared spectrometer. The photoinitiators used curing was benzophenone, Darocur 1173, and Irgacure 184. Irgacure 184 showed the highest curing rate amont them. Based on the curing rate and tensile strength of the cured resins. the optimum content of the photoinitiator was 1 phr. Reactive monomers, hexanediol diacrylate and tripropylene glycol diacrylate, were used to modify the tensile properties of the resins. The tensile strength of the cured resin was highest when the reactive diluent content was 30 phr. As cure time and the content of reactive monomer were increased, the elongation at break of the resins reduced.

자외선(Ultraviolet : UV) 경화형 아크릴 수지의 경화특성과 인장성질을 광 개시제의 함량과 종류, 경화시간, 그리고 반응성 단량체의 종류와 조성의 변화에 따라 조사하였다. Fourier transform infrared 분광기를 이용하여 경화가 진행되는 동안에 나타나는 화학구조의 변화를 관찰하였다. 아크릴계 올리고머의 UV 경화를 위한 광 개시제로 benzophenone, Darocur 1173, Irgacure 184를 사용하였다. 사용된 광 개시제 중에서 Irgacure 184가 가장 빠른 경화 속도를 나타내었다. 경화속도 및 물성을 고려해 볼 때 광 개시제의 최적

Keywords: UV-cure; urethane-acrylate resin; tensile properties; curing