| 초록 |
PVA has been used as surgical devices, membranes, cell adhesives, and packaging materials, because of its outstanding properties of water solubility, biocompatibility. For these various applications, the physical properties of PVA thin film have also been studied. In particular, the studies of crystallization have been investigated, because mechanical property of PVA is strongly affected by degree of crystallization. However, the crystallinity of polymeric thin film is challenge to be measured by conventional methods. To address this point, we developed the estimation system of degree of crystallization of PVA thin film by using surface wrinkling-based metrology. The surface property of wrinkled surface depends on the physical properties of each constituting layers. Therefore, the physical property of thin layer can be obtained by calculating of relationship equation. Then, the degree of crystallization is calculated by equation of physical property such as modulus and crystallinity. |
