Abstract
The kinetics of water vapor permeability of insulating tapes of the Polyen, Poliken, Nitto, and Furukawa series was studied by the gravimetric method in the temperature range from 20 to 70°С. It is shown that for all the investigated tapes, in spite of their two-layer construction, normal Fikov kinetics of permeability is observed. Diffusion coefficients that vary in the range from 2.5 to 3.1 × 10–9 cm2/s are determined, the coefficients of vapor permeability vary in the range from 0.32 to 0.37 g/m2 s. Data on the kinetics of permeability, diffusion coefficients and solubility are of practical importance for predicting the barrier properties of insulating tapes during their operation.
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