H-1 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 et al., H-1 NUCLEAR-MAGNETIC-RESONANCE STUDIES OF THE CONFORMATION OF POLY(VINYL ALCOHOL VINYL-ACETATE) COPOLYMERS IN DEUTERIUM-OXIDE SOLUTIONS AS A FUNCTION OF TEMPERATURE, Polymer, 35(16), 1994, pp. 3398-3401
H-1 nuclear magnetic resonance (n.m.r.) studies of two examples of pol
y(vinyl alcohol/vinyl acetate) copolymers, of differing residual aceta
te content and hydroxyl block size distribution, but similar acetate b
lock size distribution, are reported. The studies were undertaken over
the temperature range of 2 to 30-degrees-C, at 2-degrees-C intervals,
in D2O solution. The data appear to show correlation with previously
determined conformational changes in the polymer as a function of temp
erature; additionally the data suggest that differences in the composi
tion of the copolymers are reflected in differences in their n.m.r. sp
ectra.