Abstract
AbstractFrom the analysis of the permeation of 35S labeled ethanesulfonic acid, through nylon‐6 films sorption isotherms were obtained. The films are characterized by their largely different content of carboxyl and amino end groups. It was found that the shape of the isotherm depends on the molar ratio of the two end groups: an S‐shape curve for the film containing the carboxyl end group larger than the amino end group and a Langmuir‐type curve for the film containing comparable numbers of end groups. These results were explained by the McGregor‐Harris theory in which the acid dissociation constants of the two end groups in nylon were estimated experimentally.
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