Relationship between viscosity and direct current conductivity in PVC

In general, the d.c. conductivity σ has been considered to be inversely proportional to the viscosity η, but the relation ση = const. has not been proven in the case of the system poly(vinyl chloride)‐dioctyl phthalate. The experimental results can be described by ση m ‐1/ m = constant if the plasticizer content is not too high. The ion mobility seems to depend on a local effective viscosity, which differs from that viscosity which is derived from retardation experiments.