Abstract
The carbon-13 high resolution nuclear magnetic resonance spectra with proton spin decoupling have been obtained for poly(vinyl acetate) and poly(vinyl alcohol). Carbon-13 resonances of the skeletal carbons of poly (vinyl acetate) are more sensitive to the steric configuration than those of the side-chain carbons. The spectra of α-methine carbons of poly(vinyl alcohol) have clear splits corresponding to triad and (partially) to pentad placements. By comparing the results of carbon-13 spectra with those of proton spectra, it was confirmed that the nuclear Overhauser effect due to the proton decoupling has no influence on the estimation of microtacticity through the relative intensities of peaks in the carbon-13 spectra.It was shown that the detection and estimation of the branches in poly(vinyl alcohol) might be possible by using the carbon-13 resonance.
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Inoue, Y., Chûjô, R., Nishioka, A. et al. Carbon-13 Nuclear Magnetic Resonance Spectroscopy of Poly(vinyl acetate) and Poly(vinyl alcohol). Polym J 4, 244–252 (1973). https://doi.org/10.1295/polymj.4.244
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DOI: https://doi.org/10.1295/polymj.4.244