| 초록 |
In preparing through-thickness porous films, directional melt crystallization is a good method, since this method is a simple, cheap and defect-free method. In addition, aligned porous structures formed by this method have uniform films properties. In this study, we prepared aligned through-thickness porous films of a thermoplastic elastomer using the directional melt crystallization. By controlling the movement of a sample toward a liquid nitrogen reservoir, the nucleation and growth of solvent crystals were regulated to produce uni-directional crystals. In preparing films, we changed the critical variables such as solvent, freezing rate and concentration. From the results of mechanical properties and porosities, the through-thickness pores was found to be helpful for improving resistance against compression. This study will provide key fundamentals for the development of future polymeric foams and porous films. |
