| 초록 |
Highly fluorinated polymers have many unique properties. However, controlled polymerization of high fluorine-content monomers has been challenging due to their low solubility. Herein, we report a ring-opening metathesis polymerization (ROMP) of a norbornene monomer containing over 60 wt% fluorine. The polymerization was conducted using a fluorous block copolymer dispersant, the use of which allowed for the polymerization of the highly fluorinated monomer in widely available, non-fluorinated organic solvents at an accelerated the polymerization rate. This fluorous dispersion ROMP made possible the synthesis of high fluorine-content polynorbornenes with very high molecular weights (of over 500 kDa) and narrow molecular weight distributions (MWD ＜ 1.1), allowing us to conduct rheological studies of the new material. Moreover, the resulting fluoropolymers were obtained as polymer nanoparticles, the diameter of which could be controlled by varying the polymerization parameters. |
