Abstract
The osmotic mechanism of sorption by rubber could not be shown in the Part 1 sufficiently, because, the quantitative analysis of soluble materials in rubber was impossible.
Hence, we observe the sorption by butyl rubber which contained constant weight of electrolyte. On this experiment, the saturated values of sorption are shown as a function of electrolyte concentration in rubber and in solution. By the temperature, the sorption velocity varies, but the saturated value does not vary. And the same phenomena are recognised in the case of natural rubber and many synthetic rubber vulcanizates which do not contain fillers.
