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Blends between two types of poly(vinyl alcohol)s with different syndiotacticities

✍ Scribed by Tetsuya Tanigami; Yoshimitsu Shirai; Kazuo Yamaura; Shuji Matsuzawa

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
722 KB
Volume
35
Category
Article
ISSN
0032-3861

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## Abstract Poly(vinyl alcohol) (PVA) physical hydrogels were prepared by repeated freeze–thawing cycles using aqueous solutions of two PVA samples having different degrees of syndiotacticity, a‐PVA and s‐PVA with 55% and 61% of syndiotactic diads, respectively. The hydrogels were prepared in the p

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Transparent hydrogels were prepared by blending solutions of poly(vinyl alcohol-vinyl acetate) with either poly(acrylic acid) or poly(vinyl pyrrolidone) in the presence of glutaraldehyde as a crosslinking agent. The network obtained from the poly(vinyl pyrrolidone) system was subjected to various th