Mechanically Robust and UV‐Curable Shape‐Memory Polymers for Digital Light Processing Based 4D Printing

4D printing is an emerging fabrication technology that enables 3D printed structures to change configuration over “time” in response environmental stimulus. Compared with other soft active materials used for printing, shape-memory polymers (SMPs) have higher stiffness, and are compatible various technologies. Among them, ultraviolet (UV)-curable SMPs Digital Light Processing (DLP)-based fabricate SMP-based complex geometry high-resolution. However, UV-curable limitations terms of mechanical performance, which significantly constrains their application ranges. Here, a mechanically robust SMP system reported, highly deformable, fatigue resistant, DLP-based high-resolution (up 2 µm), exhibit large shape 1240%) upon heating. More importantly, the developed exhibits excellent resistance can be repeatedly loaded more than 10 000 times. The development improves performance structures, allows them applied engineering applications such as aerospace, smart furniture, robots.