Microstructure and compositional assignments of acrylamide/vinylidene chloride copolymers using one and two dimensional nuclear magnetic resonance spectroscopy

Copolymers containing acrylamide (A) and vinylidene chloride (V) units of d ifferent composition were synthesized by free radical solution polymerizati on. The reactivity ratios were estimated by Kelen Tudos and nonlinear error in variable methods. The triad sequence distribution in terms of A- and V- centered triads have been obtained from C-13{H-1} nuclear magnetic resonanc e spectroscopy. The complete spectral assignment in terms of compositional sequences of the overlapping carbon and proton spectra of these copolymers were done with the help of Distortionless Enhancement by Polarization Trans fer, two-dimensional proton detected heteronuclear correlation (inverse-HET COR) and Total Correlated Spectroscopy experiments. (C) 1999 Elsevier Scien ce Ltd. All rights reserved.