Topological Saponification of Oriented Poly(vinyl Trifluoroacetate) to Poly(vinyl Alcohol) with Gaseous Ammonia.

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概要

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• Drawn poly(vinyl trifluoroacetate) (PVTFA) films were converted into syndiotacticity-rich poly(vinyl alcohol) (s-PVA) films through the saponification in solid state with gaseous ammonia. The intensities of crystallization and racemic dial sensitive bands in infrared absorption spectra of the s-PVA films decreased with increasing heat-drawing ratio before Saponification. In the s-PVA film prepared from the PVTFA heat drawn before saponification, the intensity of crystallization sensitive band did not change whereas that of racemic dial sensitive band decreased with heating time respectively. This means that the solid s-PVA prepared from heat-drawn PVTFA has the solid structure determined by that of PVTFA, i. e. the low degree of crystallization and high hydrogen bond content. The s-PVA has hot-water resistance and only soluble at temperatures above 100°C.

• 日本学士院の論文

著者

• TANIGAMI Tetsuya

  Faculty of Textile Science and Technology, Shinshu University

• MATSUZAWA Shuji

  Faculty of Textile Science and Technology, Shinshu University

• WANG Qi

  Faculty of Textile Science and Technology, Shinshu University

関連論文

• Topological Saponification of Oriented Poly(vinyl Trifluoroacetate) to Poly(vinyl Alcohol) with Gaseous Ammonia.

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