Kim, Ye Chan Hong, Sungyong Sun, Hanna Kim, Meyong Gi Choi, Kisuk Cho, Jungkeun Choi, Hyouk Ryeol Koo, Ja Choon Moon, Hyungpil Byun, Doyoung Kim, Kwang J. Suhr, Jonghwan Kim, Soo Hyun Nam, Jae-Do 2024-01-20T01:01:29Z 2024-01-20T01:01:29Z 2021-09-05 2017-08 0014-3057 https://pubs.kist.re.kr/handle/201004/122462 As three-dimensional (3D) printing technology is emerging as an alternative way of manufacturing, the high resolution 3D printing device often requires systems such as drop jetting printing of in situ UV-curable photopolymers. Accordingly, the key issue is process control and its optimization to ensure dimensional accuracy, surface roughness, building orientation, and mechanical properties of printed structures, which are based on the time- and temperature-dependent glass transition temperature (T-g) of the resin system under UV-curing. In this study, the UV cure kinetics and T-g development of a commercially available UV-curable acrylic resin system were investigated as a model system, using a differential scanning photocalorimeter (DPC). The developed kinetic model included the limited conversion of cure that could be achieved as a maximum at a specific isothermal curing temperature. Using the developed model, the T-g was successfully described by a modified DiBenedetto equation as a function of UV curing. The developed kinetic model and T-g development can be used to determine the 3D printing operating conditions for the overlay printing and in situ UV curing, which could ensure high-resolution and high-speed manufacturing with various UV-curing materials. English PERGAMON-ELSEVIER SCIENCE LTD GLASS-TRANSITION TEMPERATURE COMPOSITE METHODOLOGY MECHANICAL-PROPERTIES SURFACE-ROUGHNESS PHOTO-DSC PHOTOPOLYMERIZATION POLYMERS SYSTEMS CURE DEGRADATION UV-curing kinetics and performance development of in situ curable 3D printing materials Article 10.1016/j.eurpolymj.2017.05.041 1 EUROPEAN POLYMER JOURNAL, v.93, pp.140 - 147 EUROPEAN POLYMER JOURNAL 93 140 147 scie scopus 000407186200014 2-s2.0-85020025773 Polymer Science Polymer Science Article GLASS-TRANSITION TEMPERATURE COMPOSITE METHODOLOGY MECHANICAL-PROPERTIES SURFACE-ROUGHNESS PHOTO-DSC PHOTOPOLYMERIZATION POLYMERS SYSTEMS CURE DEGRADATION Multi-jet 3D printing UV-curable polymer UV-cure kinetics Glass transition temperature Performance development Differential scanning photocalorimetry