Viscous and dielectric properties of -tocopherol and -tocopherol acetate

This article presents the results of the shear viscosity and the dielectric relaxation measurements performed for -tocopherol and -tocopherol acetate, two principal compounds from the vitamin E group. The temperature dependence of the viscosity and dielectric relaxation time of the compounds can be very well reproduced with the Vogel-Fulcher-Tammann equation. It was found that for both tocopherols, the viscosity and the relaxation time attain their infinite high value (solid-like state) at the temperature of 60 K below the transition to the glass state.