Autonomic self-healing of poly(vinyl butyral)

ABSTRACT The self‐healing behavior of poly(vinyl butyral) (PVB) is evaluated below the glass transition temperature Tg. It is found that PVB shows autonomic self‐healing even at room temperature, although Tg is around at 76°C. Furthermore, a large amount of water is found to be adsorbed on the surfa...

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Bibliographic Details
Published in:Journal of applied polymer science 2015-06, Vol.132 (22), p.np-n/a
Main Authors: Arayachukiat, Sunatda, Doan, Vu Anh, Murakami, Tatsuya, Nobukawa, Shogo, Yamaguchi, Masayuki
Format: Article
Language:English
Subjects:
Glass transition temperature
Glassy
Healing
Humidity
Localization
Materials science
Photoelectron spectroscopy
Polymers
Razor blades
rheology
Scars
stimuli-sensitive polymers
structure-property relations
surfaces and interfaces
thermoplastics
X-rays
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Summary:ABSTRACT The self‐healing behavior of poly(vinyl butyral) (PVB) is evaluated below the glass transition temperature Tg. It is found that PVB shows autonomic self‐healing even at room temperature, although Tg is around at 76°C. Furthermore, a large amount of water is found to be adsorbed on the surface of the film. This is attributed to the surface localization of hydroxyl group in PVB, which is confirmed by X‐ray photoelectron spectroscopy. Since the surface is plasticized by water, the scar applied by a razor blade is healed even in the glassy state of the bulk. Moreover, the healing efficiency is enhanced at high humidity condition, owing to the pronounced plasticizing effect by water. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42008.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.42008