| 초록 |
The adhesive is a material that generally applied in a liquid state and cured into a solid to form adhesion. However, pressure-sensitive adhesive (PSA), a type of adhesive, is able to form adhesion with substrate without phase change. The characteristic is attributed to the low Tg and proper viscoelastic properties of PSA. However, it means that the PSA, whose Tg and viscoelastic characteristics are determined, has no change in adhesive force when external conditions are fixed. Recently, researchers have studied the adhesives that can control its adhesion properties for convenience of use or advanced manufacturing processes. We fabricated photo-responsive switchable PSA using azobenzene-containing acrylic polymer and aliphatic monomers. Adhesive force of our switchable PSA was rapidly “switched on” and “switched off” by UV and visible light irradiation, respectively. The switching property was affected by hydrocarbon chain length of the azobenzene-containing aliphatic monomers. |
