Abstract
Statistical distributions of surface area A, volume V, and center-to-center distance l, of isolated cells were discussed on the polymeric foam substances. The results are as follows:
(1) The distribution function of A and V, f(A) and f(V) are obtained on the typical five types of distribution of radius of cells f(r), described in the previous paper (I). Mean values A, V, of the distribution and the variance σA2, σV2, are also calculated.
(2) Denoting the radius of the circle on the cross-section of foam substance s, and the center-to-center distance of the circles d, it is shown that the relationship between f(l) and f(d) is substantially similar to the previously described relation between f(r) and f(s).
(3) The mean velue l is evaluated from the value of r and the packing factor p of the foam substance. The following equation is obtained:
where kv′ is a constant depending on the type of f(r).
