Studies of High Polymers by Radioactive Method I Self-Diffusion of Ions in Ion Exchangers

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In order to study kinetic exchange reaction and self-diffusion of ions in ion exchangers, the rate of ion exchange was measured by radioactive tracer method similar to that employed by A. Langer and Pitts’ general theory of radioactive ion exchange was applied, with the focus of attention on the rate determining factor of reaction in each case, to analyse the results. When concentrated external solution is utilized, diffusion of cation in cation exchangers and diffusion of anion in anion exchangers was suggested to be the controlling factor, whereas in the case of the use of dilute external solution, the rate of exchange is probably controlled by surface diffusion. In the former case, diffusion coefficients, activation energy of diffusion, and activation entropy of diffusion were calculated, and from the results obtained, the mechanism of diffusion in the exchange resins was discussed.

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