Dielectric measurements on water mixtures of polymers such as poly(vinylpyrrolidone) (PVP), poly(ethylene
glycol) (PEG), poly(vinyl methyl ether) (PVME), poly(vinyl alcohol) (PVA), poly(acrylic acid) (PAA), poly-
(ethylenimine) (PEI), and poly(allylamine) (PAlA) were performed over a frequency range from 300 MHz to
15 GHz at 25 °C. Dielectric dispersion and absorption curves related to the orientational motion of water
can be described well by the Cole-Cole equation. The distribution of the relaxation time is interpreted by
the variation of the water structure. The logarithmic plot of the relaxation time against the parameter for the
distribution of the relaxation time suggests two groups of polymers. One group contains nonelectrolyte
polymers and another contains electrolyte polymers and PVA. This result implies that water structures in the
mixtures of the former group are more uniform and stable than that in the mixtures of the latter group.