The dielectric relaxation and conductivity of polyvinylcaprolactam (PVCL)-water systems of different compositions (with water contents of ∼ 1,5, and 24 wt %) were studied by means of dielectric spectroscopy ($10^{-1}$-$10^7$ Hz) at −100−50°C. It was found that the conductivity of samples with a low content of water upon cooling has an activation character, whereas a cooperative mechanism of conduction holds for the PVCL-water system with 24 wt % water, which switches to an activation character of interactions of water with polymer changes in the course of a glass transition.
72.80.Le Polymers; organic compounds
82.35.Lr Physical properties of polymers
Chair of Physics of Polymers and Crystals, Faculty of Physics, Moscow State University, Moscow, 119991, Russia
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