Effect of Chemical Structure of Acrylate Monomer on the Transparent Acrylic Pressure Sensitive Adhesives for Optical Applications

To prepare transparent acrylic pressure sensitive adhesives (PSAs), terpolymer syrups were photopolymerized from 2-ethylhexyl acrylate and 2-hydroxyethyl acrylate with third monomer having different chemical structure. Alter polymerization, 1,6-hexanediol diacrylate as a crosslinker and a photoinitiator were added and then UV-irradiated to prepare the PSAs. The adhesion performances and optical characteristics of the PSAs were investigated. Their adhesion performance was dependent on the composition of monomers in the polymer chain but optical properties were maintained at a suitable level. The PSAs prepared by bulky and heteroatom-containing monomers such as IBOA, THFA, and ACMO showed better adhesion performance than others.