1H nuclear magnetic resonance (n.m.r.) studies of two examples of poly(vinyl alcohol/vinyl acetate) copolymers, of differing residual acetate content and hydroxyl block size distribution, but similar acetate block size distribution, are reported. The studies were undertaken over the temperature range of 2 to 30°C, at 2°C intervals, in D20 solution. The data appear to show correlation with previously determined conformational changes in the polymer as a function of temperature; additionally the data suggest that differences in the composition of the copolymers are reflected in differences in their n.m.r, spectra.
Посилання на статтю:
1H nuclear magnetic resonance studies of the conformation of poly(vinyl alcohol/vinyl acetate) copolymers in deuterium oxide solutions as a function of temperature / D. Eagland*, D. J. Maitland, N. J. Crowther and W. L. Titterton // Polymer. – 1994. – Vol 35. – P. 3398-3401.