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The tracer diffusion of dye anions in nylon 6 film
Author(s) -
Chantrey G.,
Rattee I. D.
Publication year - 1974
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1974.070180109
Subject(s) - diffusion , tracer , adsorption , ion , saturation (graph theory) , limiting , chloride , molecule , nylon 6 , polymer , chemistry , materials science , chemical physics , thermodynamics , analytical chemistry (journal) , polymer chemistry , organic chemistry , mechanical engineering , physics , mathematics , combinatorics , nuclear physics , engineering
The tracer diffusion coefficients of three S‐35‐labeled dyes in nylon 6 film have been determined. The diffusion coefficients show marked concentration dependence, but this takes a form different from that shown by chloride ions in a related study. It is not possible to explain the data on the basis of electrostatic factors as in earlier work in which diffusion was accompanied by a free‐energy change. A diffusional interaction between dye molecules is postulated which takes the form of a free‐volume saturation effect leading to an upper limiting diffusion coefficient at adsorption levels which depend upon the polymer order and the characteristics of the diffusing ion.