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Water stability of syndiotactic poly(vinyl alcohol)/iodine complex film
Author(s) -
Lyoo Won Seok,
Yeum Jeong Hyun,
Choi Jin Hyun,
Song HanChul,
Ji Byung Chul,
Kim Jae Pil,
Noh Tae Hwan,
Yoon Woong Jae,
Cheong Tae Sik
Publication year - 2001
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1829
Subject(s) - vinyl alcohol , iodine , desorption , polymer chemistry , tacticity , materials science , solubility , diad , polymerization , degree of polymerization , chemical engineering , nuclear chemistry , chemistry , copolymer , organic chemistry , polymer , composite material , adsorption , engineering , metallurgy
The desorption behavior of iodine in syndiotactic poly(vinyl alcohol) ( s ‐PVA) with a syndiotactic diad content of 63.1% iodine film in water was investigated in relation to the solubility of s ‐PVA in water. Despite a low number‐average degree of polymerization of 900, the degree of solubility of s ‐PVA film in water at 80°C was limited to about 10%, whereas atactic poly(vinyl alcohol) ( a ‐PVA) film was completely soluble at a lower temperature, 50°C. The degree of iodine desorption of s ‐PVA/iodine film at a high temperature decreased remarkably compared with that of a ‐PVA/iodine film. The fastness of iodine of the drawn s ‐PVA/iodine film was far superior to that of the undrawn film. Over a draw ratio of 5, the iodine desorption was suppressed significantly with increasing drawing temperature rather than the draw ratio. In addition, the iodine desorption of postdrawn s ‐PVA/iodine film was lower than that of predrawn s ‐PVA/iodine film. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 108–113, 2001
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