| 초록 |
For evaluating creep behavior of acrylic pressure sensitive adhesive at folded flexible display, shear creep test was performed. Dynamic mechanical analysis (DMA) was used to measure shear creep behavior. By using DMA, it is possible to adjust fine creep factors, such as creep stress, temperature, and strain values in micro scale. But, there was limitation to measure long term creep behavior by DMA. Therefore, time-temperature superposition principle was used to get creep master curves of acrylic PSA. Shift factors were obtained empirically, and other constants were calculated by the Williams, Landel and Ferry equation (WLF equation). |
