| 초록 |
We investigated the effects of UV-LED wavelength (365 nm, 395 nm, and 405 nm) on the curing properties of black color coating. The kinetics of photopolymerization were monitored by photo differential scanning calorimetry (photo-DSC). The unreacted acrylate groups in the coating network was measured by FT-IR/ATR. The results of Photo-DSC show that the overall rate of polymerization as well a final conversion of 365 nm UV-LED cured system are higher than those of 395 nm and 405 nm UV-LED cured systems. The results of FT-IR/ATR spectroscopy data for the all UV-LED cured systems show that the degree of cross-linking is lower at the film-air interface than at the film-substrate interface due to the oxygen inhibition. However, we found out that the 405 nm UV-LED was more effective for the through curing of black color coating. |
