| 초록 |
The cure behavior, thermal properties and optical properties of ultraviolet (UV) cured epoxy acrylate/clay nanocomposite films were investigated using FTIR, DSC, TMA and TGA. The dispersion of clay in the nanocomposites was characterized by X-ray diffractometer and transmission electron microscope. Clay used was a natural montmorillonite modified organically with a quaternary ammonium salt. The amount of the organoclay added to the epoxy acrylate resin was 0 to 5 phr. The amount of a reactive diluent, hexanediol diacrylate (HDDA) added to the epoxy acrylate resin was 30 phr. 3 phr of a photoinitiator, 2-hydroxy-2-methyl-1-phenylpropan-1-one (Darocur 1173), was introduced to the resin system. UV curing of the epoxy acrylate/clay nanocomposite systems was carried out in a conveyer system. Transmittance measured by UV-Visible spectrophotometer was a little decreased with increasing clay contents. The glass transition temperature of the epoxy acrylate/clay nanocomposite film increased with increasing clay content. |
