| Abstrakt: |
A free radical photosensitive resin suitable for ultraviolet (UV) cured 3D direct ink writing printing was synthesized using bisphenol-A epoxy acrylate (EA) as a prepolymer, 1,6-hexanediol diacrylate (HDDA) as a monomer, and 2,4,6-trimethylbenzoyl diphenylphosphine oxide (TPO) as an initiator. The resin could form a cross-linked network under UV irradiation. The effect of TPO content on the surface drying time, gel rate, and volume shrinkage of photosensitive resin were investigated. The results indicated that when 6 g TPO was added, the surface drying time of the cured resin was the shortest, its gel rate was highest, and its volume shrinkage was largest. According to these results, the effect of the mass ratio of prepolymer to monomer on the surface drying time, viscosity, gel rate, volume shrinkage, and mechanical properties of the photosensitive resin were investigated. The results demonstrated that the photosensitive resin containing 6 g TPO had the shortest surface drying time, lower viscosity, the largest gel rate, and excellent mechanical properties at an EA/HDDA of 20/9. This suggests that the developed photosensitive resin is suitable for use in UV cured 3D direct ink writing printing. [ABSTRACT FROM AUTHOR] |
