EFFECTIVE CONDUCTIVITY IN ASSOCIATION WITH MODEL STRUCTURE AND SPATIAL INHOMOGENEITY OF POLYMER/CARBON BLACK COMPOSITES

摘要

The relationship between effective conductivity and cell structure of polyethylene/carbon black composites as well as between effective conductivity and spatial distribution of carbon black are discussed. Following Yoshida's model both structures can, in a way, be said to be intermediate between the well known Maxwell-Garnett (MG) and Bruggeman (BR) limiting structures. Using TEM photographs on composites with various carbon blacks we have observed that the larger is Garncarek's inhomogeneity measure H of two-dimensional (2D) representative distribution of the carbon black, the smaller is the effective conductivity of the composite. [References: 17]