Journal of Applied Polymer Science, Vol.86, No.2, 504-508, 2002
A study of solvent exchange process in (ethylene-vinyl alcohol) copolymer gels by a proton nuclear magnetic resonance spectroscopy imaging method
The proton nuclear magnetic resonance (H-1 NMR) image patterns of (ethylene-vinyl alcohol) copolymer (EVOH)/dimethylsulfoxide (DMSO) gels with various ethylene contents were measured to elucidate the process of solvent exchange between DMSO and water in the gels soaked in water. The results of these experiments indicate that the rate of solvent exchange between DMSO and water in the gels increased with an increase in the ethylene content of EVOH copolymers.