| 초록 |
Flexible but still hard coating materials have been paid attention for applications in flexible electronic devices, as efforts to substitute glasses. However, there have been little approaches to find out control parameters determining their flexibility and hardness. Here, we present reaction-controlled ladder-like polymers with improved flexibility and hardness. In this study, the effects of various reaction conditions on the molecular weight of the polymer are investigated in terms of reaction time, and absence of byproducts, accompanying the analysis of mechanical properties of the corresponding films using nanoindentation. We also fabricated a rigid-soft-rigid (RSR) cover window of heterogeneous surface coating with a home-made slot-die coater. Finally, we demonstrate that the bending cycle reliability was also improved in terms of warpage with less irreversible deformation upon the folding test. |
