Fig. 3

500 MHz ¹H NMR spectrum of PVA dispersion. 4.77 ppm—chain methine groups in acetate units; 4.67, 4.46, 4.21 ppm—hydroxyl groups in alcohol units; 4.08–3.64 ppm—chain methine groups in alcohol units; 3.34 ppm—water; 2.50 ppm—solvent (DMSO); 2.16–1.57 ppm—chain methylene and side methine groups in acetate units; 1.57–1.21 ppm—chain methylene groups in alcohol units. Molar content of alcohol units [OH] was calculated from the data for low- and high-field regions as \([{\text{OH}}] = \frac{{{\text{I}}(4.08 - 3.64)}}{{{\text{I}}(5.1 - 4.1)}}\) and \([{\text{OH}}] = \frac{{{\text{I}}(1.57 - 1.21)/2}}{{{\text{I}}(1.57 - 1.21)/2 + {\text{I}}(2.16 - 1.57)/5}}\) giving the result of [OH] about 10 %