The molecular design of photo-curable and high-strength benzoxazine for 3D printing

• Main Authors: Lu, Yong, Ng, Joseph Kok Wei, Chen, Hui, Chen, Xuelong, Lim, Jacob Song Kiat, Yan, Weili, Hu, Xiao
• Other Authors: School of Materials Science and Engineering
• Format: Article
• Language: English
• Published: 2022
• Subjects: Engineering::Materials; Benzoxazines; Thermosets
• Online Access: https://hdl.handle.net/10356/160456
• Institution: Nanyang Technological University

Low viscosity photo-curable benzoxazines (BZs) are designed and synthesized for use in stereolithography 3D printing. An initial investigation shows that the thermally polymerized polybenzoxazines (PBZs) have remarkably high T-g (264 degrees C) and flexural modulus (4.91 GPa) values. Subsequently, the formulated photoprintable resins are employed for use in high-resolution projection micro-stereolithography (P mu SL) printing. Complex PBZ 3D structures can be achieved from the as-printed objects after they are thermally treated. These findings advance the design of BZ monomers for photopolymerization-based 3D printing and offer a method for the efficient fabrication of high-performance thermosets for various demanding engineering applications.