Fourier Self-Deconvolution Analysis of Hydrogen Bonding States of Polyvinylpyrrolidone in an Amorphous Sugar Matrix Below and Above the Glass Transition Temperature

In an amorphous mixture of sugar and polyvinylpyrrolidone (PVP), PVP carbonyl groups form hydrogen bonds with sugar hydroxyl groups, thereby improving the physical stability of the amorphous matrix against a glass-to-rubber transition. Herein, Fourier self-deconvolved IR bands due to the C=O stretch...

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Bibliographic Details
Published in:Spectroscopy letters 2008-09, Vol.41 (6), p.305-312
Main Authors: Imamura, Koreyoshi, Ohyama, Ken-ichi, Tani, Kazuko, Yokoyama, Toru, Maruyama, Yoshinobu, Imanaka, Hiroyuki, Nakanishi, Kazuhiro
Format: Article
Language:English
Subjects:
amorphous sugar
carbonyl stretching vibration
fourier self-deconvolution
glass transition temperature
polyvinylpyrrolidone
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Summary:In an amorphous mixture of sugar and polyvinylpyrrolidone (PVP), PVP carbonyl groups form hydrogen bonds with sugar hydroxyl groups, thereby improving the physical stability of the amorphous matrix against a glass-to-rubber transition. Herein, Fourier self-deconvolved IR bands due to the C=O stretching vibration of PVP in sugar-PVP mixtures were analyzed. The C=O groups in sugar-PVP mixtures generally had four vibrational states, corresponding with free and hydrogen-bonded C=O in three different modes. Changes in these vibrational states induced by increasing the temperature were compared among various sugar-PVP mixtures. Formation and thermal disruption characteristics of different modes of sugar-PVP hydrogen bondings are discussed.
ISSN:0038-7010
1532-2289
DOI:10.1080/00387010802370959