| 학회 |
한국고분자학회 |
| 학술대회 |
2004년 봄 (04/09 ~ 04/10, 고려대학교) |
| 권호 |
29권 1호, p.127 |
| 발표분야 |
고분자 가공/블렌드 |
| 제목 |
Water stability of high molecular weight syndiotactic poly(viny alcohol)/ atactic poly(vinyl alcohol)/iodine blend films |
| 초록 |
To investigate the water stability of syndiotactic poly(vinyl alcohol) (s-PVA)/atactic PVA (a-PVA)/iodine blend film, we prepared two PVAs with similar number-average degrees of polymerization of 4,000 and degrees of saponification of 99.9% and with different syndiotactic diad contents of 58.5% and 53.5%, respectively. In general, the water stability of the blend films was affected by the blend ratios of s-PVA/a-PVA. And, the desorption behavior of iodine in s-PVA/a-PVA/iodine complex films in water was investigated in terms of the solubility of s-PVA/a-PVA blend films in water. The degree of solubility of s-PVA/a-PVA blend films having s-PVA content over 50% in water at 70 ℃ was limited to about 10-20%, whereas those of s-PVA/a-PVA blend film with s-PVA content of 10% were 85% at the same conditions. The degree of iodine desorption of complex blend films was decreased with increasing s-PVA content. Especially, the degree of iodine desorption of s-PVA/a-PVA drawn film having s-PVA content of 90% was limited to 7%, regardless of soaking temperature from 30 to 70 ℃. The desorption of iodine in water was strongly affected by the dissolution of blends. Moreover, stability of iodine of the drawn s-PVA/a-PVA/iodine blend films in hot water was far superior to that of the undrawn one. |
| 저자 |
곽진우1, 박주민1, 염정현2, 지병철2, 류원석1
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| 소속 |
1영남대, 2경북대 |
| 키워드 |
water stability; PVA; blend film
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| E-Mail |
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