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http://dx.doi.org/10.14478/ace.2020.1005

Effect of Silane Coupling Agent on Adhesion Properties between Hydrophobic UV-curable Urethane Acrylate and Acrylic PSA  

Noh, Jieun (Chemical Materials Solutions Center, Korea Research Institute of Chemical Technology)
Byeon, Minseon (Chemical Materials Solutions Center, Korea Research Institute of Chemical Technology)
Cho, Tae Yeun (Chemical Materials Solutions Center, Korea Research Institute of Chemical Technology)
Ham, Dong Seok (Chemical Materials Solutions Center, Korea Research Institute of Chemical Technology)
Cho, Seong-Keun (Chemical Materials Solutions Center, Korea Research Institute of Chemical Technology)
Publication Information
Applied Chemistry for Engineering / v.31, no.2, 2020 , pp. 230-236 More about this Journal
Abstract
In this study, an adhesive tape with water and impact resistance for mobile devices was developed using a UV-curable urethane acrylate based polymer as a substrate. The substrate fabricated by UV-curable materials shows hydrophobicity and poor wettability, which significantly deteriorates the interface-adhesions between the substrate and acrylic adhesive. In order to improve the interface adhesion, 3-glycidoxy-propyl trimethoxysilane (GPTMS), a silane coupling agent having epoxy functional groups, was selected and incorporated into UV-curable urethane acrylate based polymer resins in various contents. The changes of the chemical composition according to the contents of GPTMS was studied with Fourier-transform infrared spectroscopy (FT-IR), energy-dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS) to know the surface bonding properties. Also mechanical properties of the substrate were characterized by tensile strength, gel fraction and water contact angle measurements. The peel strengths at 180° and 90° were measured to compare the adhesion between the substrate and adhesive according to the silane coupling agent contents. The mechanical strength of the urethane acrylate adhesive tape decreased as the silane coupling agent increased, but the adhesion between the substrate and adhesives increased remarkably at an appropriate content of 0.5~1 wt%.
Keywords
UV-curable urethane acrylate; Silane coupling agent; Acrylic PSA; Adhesives;
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