| 초록 |
In the two-component system of monomer and oligomer, the peak of the acrylate characteristic of each component was observed by FTIR spectroscopy and the relative reactivity ratios were obtained using Jaacks plot and Fineman-Ross method. The composition and the sequence distribution of different repeat units in the copolymer could be predicted using reactivity ratios, the mole fraction of monomers in the feed, and the mole fraction of monomers in the copolymer. The photo-curing behavior of mixtures of urethane acrylate oligomer with acrylate monomers was investigated using time-resolved FTIR spectroscopy and photo-DSC. The results of curing kinetics were compared with the copolymer composition. It was found that the chemical structure and methacrylate group of the acrylate monomer affected the reactivity ratio and the curing kinetics. Based on such information on chain structure of copolymers, it is possible to explain different mechanical properties of photo-cured acrylate mixtures. |
