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It was shown in our laboratoly that anomalous rubber − like hydrogel is obtained by means of repeated freezing of aqueous solution of poly ( vinyl alcohol ) , Unexpected superior water resisting propert 重 es of the gel are described in this paper : Specimen ( l g of gel containing 80% water , prepared hy freezing of six times ) was extracted three times with 50 m ♂of warmed water . No cross linkjng agents was employed throughout the procedures , nevertheless swellingdoi:10.4286/ikakikaigaku.59.11_525 fatcat:nubuqcn3kvdu5ks5gr5uevwkky