| 초록 |
For the fabrication of wireless actuators, we designed and successfully synthesized dendronized polynorbornene (denpol) with azobenzene-based macromonomers. The denpol (PAZ3) with a low polydispersity (PDI) and well-defined molecular weights was obtained through ring opening metathesis polymerization (ROMP). Based on 2D wide angle X-ray diffraction (2D WAXD) results and thermal behaviors, the uniaxially orientation of PAZ3 film with the layered superstructures was identified. The trans-to-cis isomerization of azobenzene-based macromonomer upon UV light irradiation was investigated through UV-Vis spectroscopy. UV light irradiation to the PAZ3 film resulted in bending to the light direction. It can be applied to the device constituting the light-emitting diode (LED) circuit using photo-responsive actuations, and the opening/closing of the circuit can be controlled by UV and visible light. This work was supported by Mid-Career Researcher Program (2021R1A2C2009423), BK21 FOUR Program. |
