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The interfacial adhesion strength is very important in deposited PC film for the barrier enhanced polycarbonate (PC) flexible substrate. In this study, PC films were treated by undercoating, UV/ and low temperature plasma and then the effect of physical and chemical surface modifications on the interfacial adhesion strength between PC film and barrier layer were studied. It was found that untreated PC film shows significantly low interfacial adhesion strength due to the smooth surface and low surface free energy of PC. Low temperature plasma treatments resulted in the increase of both surface roughness and surface free energy due to etching and the appearance of polar molecules on the PC surface. However, UV/ treatment only shows the increase of surface free energy by developed polar molecules on the surface. These surface modifications caused the enhancement of surface interfacial strength between PC film and barrier. In the case of undercoating, it was found that the increase of surface interfacial strength was achieved by adhesion between various acrylic acid on acrylate coated surface and without increase of polar surface energy. In addition, the barrier property is also improved by organic-inorganic hybrid multilayer structure.

Effect of Surface Treatment of Polycarbonate Film on the Adhesion Characteristic of Deposited SiOxBarrier Layer

Effect of Surface Treatment of Polycarbonate Film on the Adhesion Characteristic of Deposited SiO_xBarrier Layer