| 초록 |
Hydrogels have a unique position in medical, pharmaceutical, and related fields because of their high water content. They are widely used for membranes, contact lenses, and materials for drug delivery system. The crosslinked atactic poly(vinyl alcohol) (a-PVA) hydrogel has much attention because of its high degree of swelling in water, inherent non-toxicity, good biocompatibility, and desirable physical properties. However, mechanical properties and thermal stability of a-PVA hydrogels are much weaker in comparison with those of the syndiotacticity-rich PVA (s-PVA) hydrogel. So, to examine the swelling behavior as well as mechanical properties of s-PVA hydrogels in this study, we prepared s-PVA with number-average degree of polymerization of 3600, syndiotactic diad content of 57%, and degree of saponification of 99.9%, respectively. S-PVA hydrogels were prepared by using glutaraldehyde as a crosslinking agent. We observed equilibrium water content, degree of swelling, Young's modulus, tensile strength, and elongation of the s-PVA hydrogel.
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