Abstract
The 1H and 13C nuclear magnetic resonance spectra of atactic poly(vinyl alcohol) in D2O at a temperature of 353 K were analyzed by various two-dimensional NMR (2D NMR) methods including 1H J-resolved spectroscopy, 1H F1-axis broad-band decoupled correlation spectroscopy, 1H broad-band decoupled 13C-1H chemical shift correlation spectroscopy, and two-dimensional INADEQUATE spectroscopy. The combined use of these two-dimensional NMR methods provided absolute assignments of 1H and 13C spectra at triad-tetrad and pentad-hexad levels, respectively. The polymerization of PVA follows Bernoullian statistics with Pm=0.47 at the triad-tetrad level, but does not follow any statistics at the pentad-hexad level.
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Hikichi, K., Yasuda, M. Two-Dimensional 1H and 13C Nuclear Magnetic Resonance Studies of Poly(vinyl alcohol). Polym J 19, 1003–1012 (1987). https://doi.org/10.1295/polymj.19.1003
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DOI: https://doi.org/10.1295/polymj.19.1003