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Role of the stereosequences of poly(vinyl alcohol) in the rheological properties of syndiotacticity-rich poly(vinyl alcohol)/water solutions

✍ Scribed by Won Seok Lyoo; In Seok Seo; Byung Chul Ji; Joon Ho Kim; Sam Soo Kim; Han Do Ghim; Byoung Chul Kim; Jinwon Lee

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
101 KB
Volume
88
Category
Article
ISSN
0021-8995

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The crystallinity, solubility, degree of swelling, and hygroscopicity of the blends of syndiotactic-rich (st-PVA) and atactic poly(viny1 alcohols) (at-PVA) were studied. The crystallinity of the blends increased with increasing annealing temperature and that of the blends annealed at 200Β°C was large

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The permeabilities of liquids through syndiotactic-rich poly (vinyl alcohol) (s-PVA) very thin films (about 0.3 pm) scooped up from the interface of air/aqueous solution were compared with that of casting s-PVA films (about 15 pm) . The permeability of water decreased with time and the volume of per