鎖状高分子の誘電緩和についてのノート (I)

ポリ塩化ビニルのβ吸収の機構

抄録

The mechanism of the dielectric β-dispersion in the polyvinylchloride is discussed. As is well known, the a-dispersion is due to the rotational of the monomers or segments from one of their quasistable positions to another around the skeletal bonds of the chain. As the temperature becomes lower, such rotational motions tend to be less and less active and, finally, monomers or segments become quenched near one of their quasistable positions. It is known that the β-dispersion occurs in such a temperature range and, in our opinion, this is related to the high-elastic small rotation of the monomers or segments near the quenched positions due to the external electric field.
From this point of view, a phenomenological theory is extended for the dielectric β-dispersion in the polyvinyl-chloride. The orders of the magnitudes of some quantities which appear in our theory are evaluated using the experimental values obtained from the mechanical dispersion. Our result can explain the experimental facts characteristic of β-dispersion not only qualitatively but also semi-quantitatively.
The case of polytrifluoromonochloroethylene is also discussed.