Jr. Isasi et al., FTIR STUDY OF HYDROGEN-BONDING AND PHASE-BEHAVIOR IN POLY(VINYLPYRIDINES) POLY(ETHYLENE-CO-VINYL ALCOHOL) BLENDS/, Macromolecular symposia, 94, 1995, pp. 201-209
The specific interactions between polyvinylpyridines and ethylene-viny
l alcohol copolymers of different compositions have been studied by Fo
urier transform infrared spectroscopy (FTIR). Hydrogen bonding between
both polymer components leads to significant spectral modification in
pyridine rings spectral bands. Minor modifications in other spectral
modes have been also detected. The spectral results indicate at least
three competing equilibria processes in the blends: hydroxyl-hydroxyl
copolymer self-association and hydroxyl-pyridine interassociation. Pai
nter-Coleman association model was successfully applied and the phase
diagram for these systems has been predicted.