Abstract
Some N-substituted acrylamide polymers are sensitive to temperature in aqueous media. For example, their aqueous solutions become cloudy above specific temperatures and the gels of those polymers shrink by releasing water when they are heated, while they swell by absorbing water when they are cooled.
Those phenomena are explained by introducing a two hydrated layers model which consists of a inner layer tightly connected to polymer chains and an outer layer loosely connected to inner layer.
