Yōichi Ishida

Studies on dielectric behavior of high polymers

SummaryThe frequency characteristics of ε′ and ε″ for polyvinyl chloride, polyvinyl isobutylether and Nylon 6 were measured over the frequencies from 100 c/s to 2 · 106 c/s, at various temperatures.Theα-absorption and theβ-absorption were both observed for polyvinyl chloride, but only theα-absorption for polyvinyl isobutylether and only theβ-absorption for Nylon 6.Cole andColes circular arc law was satisfactorily applied to these data, and the parameters, (ε0-ε∞) and

Studies on dielectric properties of polyacrylonitrile

\bar \beta

Dielectric behavior of polychloroprene

were determined at each temperature. In the temperature-dependence of (ε0ε∞) and

Studies on dielectric properties of polyvinylidene chloride

\bar \beta

Effects of degree of crystallinity upon dielectric behaviors in some aromatic Polyesters

, theα-absorption and theβ-absorption showed their respective characteristics, independent of the kind of samples. The value of (ε0-ε∞) for theα-absorption decreases with increasing temperature, over higher temperature range. The value of (ε0−ε∞) for theα-absorption reaches to an asymptotic value with increasing temperature, while showing the tendency to approach to zero at very low temperatures. It might be, therefore, expected that theα-absorption becomes broader and disappears in very low temperatures. The values of