| 초록 |
There has been extensive research on oxygen inhibited photopolymerization, a phenomenon that the surface of a polymer exposed to the atmosphere “unpolymerize” due to scavenging free radicals by oxygen molecules. Most of the previous studies are investigated in one-dimensional analysis about oxygen diffusion and polymerization in film. This presentation, however, deals with oxygen inhibition of UV-curable polymers placed on micron scales topological structures/templates which are widely used in soft lithography. The effects of the template geometry and the thickness of the coated polymer, as well as initiation rate, which influence the reaction are investigated. To this end, two-dimensional finite element modeling was applied and compared with experimental results. Furthermore, through the oxygen concentration gradient in template, it was confirmed that not only the template plane-parallel polymer shape but also the non-flat, pseudo-3D one could be made. |
