NUCLEAR-MAGNETIC-RESONANCE STUDY OF COMMERCIAL POLY(VINYL ACETATE)

The commercial poly(vinyl acetate) bulk was studied by nuclear magneti c resonance (NMR) at solution and solid state to understand much bette r the behavior of this polymer to obtain information on structure, sam ple molecular mobility, and heterogeneity. To analyze the behavior of this polymer, we have chosen NMR techniques, such as carbon-13 solutio n, magic angle spinning, cross-polarization/magic angle spinning, prot on spin-relaxation time in the rotating frame parameter (T(1)rho), and dipolar dephasing experiment. Therefore, from the NMR response, poly( vinyl acetate) presents a random monomer sequence distribution along t he macromolecule chains, and this provides microdomains with different mobilities. (C) 1998 John Wiley & Sons, Inc.