3D打印用光固化树脂产品性能研究

Study on properties of light⁃cured resin products for 3D printing

针对目前光固化(SLA)树脂的市场需求,采用双酚A环氧丙烯酸酯、二丙烯酸酯、三丙烯酸酯及光引发剂进行复配,制备硬质紫外SLA树脂产品,通过电子万能材料试验机、平板流变仪、电子比重计等对组分含量不同的SLA树脂材料的力学性能、黏度、体积收缩率等进行了测试,确定了产品配方,并用该配方SLA树脂进行了SLA 3D打印。结果表明,较合适的SLA树脂的配方为2 mol低聚物双酚A环氧丙烯酸酯、20 mol活性稀释剂及适量光引发剂,采用该配方制得的SLA树脂黏度为240.8 mPa∙s,拉伸强度为47.1 MPa,断裂伸长率为5.62%,体积收缩率为4.44%,所制备的产品表面光滑、性能优异。

According to the current market demands for light curing(SLA)resins,bisphenol-A epoxy acrylate,diacry-late,and triacrylate resins together with a photo-initiator were used to prepare hard UV SLA resin products.The me-chanical properties,viscosity,and volume shrinkage of the resultant resins was investigated using an electronic universal material testing machine,a plate rheometer,and an electronic hydrometer,and their product formulas were determined.SLA 3D printing was carried out using these formulas.The results indicated that 2.0 mol of oligomer bisphenol-A epoxy acrylate,20.0 mol of active diluent,and an appropriate amount of photo-initiator were determined as a proper formula for the SLA resins.The SLA resins obtained a viscosity of 240.8 mPa∙s,tensile strength of 47.1 MPa,elongation at break of 5.62%,and a volume shrinkage rate of 4.44%.The printed products exhibited a smooth surface and excellent performance.