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Polymers 2017, 9(10), 493; https://doi.org/10.3390/polym9100493

Surface Properties of a Novel Poly(vinyl alcohol) Film Prepared by Heterogeneous Saponification of Poly(vinyl acetate) Film

1
Department of Bio-Fibers and Materials Science, Kyungpook National University, Daegu 41566, Korea
2
Department of Textile Engineering & Technology, Yeungnam University, Gyeongsan 38541, Korea
*
Authors to whom correspondence should be addressed.
Received: 2 August 2017 / Revised: 28 September 2017 / Accepted: 6 October 2017 / Published: 9 October 2017
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Abstract

Almost general poly(vinyl alcohol) (PVA) films were prepared by the processing of a PVA solution. For the first time, a novel poly(vinyl alcohol) (PVA) film was prepared by the saponification of a poly(vinyl acetate) (PVAc) film in a heterogenous medium. Under the same saponification conditions, the influence of saponification time on the degree of saponification (DS) was studied for the preparation of the saponified PVA film, and it was found that the DS varied with time. Optical microscopy was used to confirm the characteristics and surface morphology of the saponified PVA film, revealing unusual black globules in the film structure. The contact angle of the films was measured to study the surface properties, and the results showed that the saponified PVA film had a higher contact angle than the general PVA film. To confirm the transformation of the PVAc film to the PVA film, 1H nuclear magnetic resonance spectroscopy, X-ray diffraction measurements, differential scanning calorimetry, and Fourier-transform infrared spectroscopy were employed. View Full-Text
Keywords: poly(vinyl alcohol) film; poly(vinyl acetate); solution casting; heterogeneous saponification; degree of saponification poly(vinyl alcohol) film; poly(vinyl acetate); solution casting; heterogeneous saponification; degree of saponification
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Yang, S.B.; Yoo, S.H.; Lee, J.S.; Kim, J.W.; Yeum, J.H. Surface Properties of a Novel Poly(vinyl alcohol) Film Prepared by Heterogeneous Saponification of Poly(vinyl acetate) Film. Polymers 2017, 9, 493.

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