Surface Active Properties of Simple Cyclic and Heterocyclic Amines in Water.

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The surface tension of aqueous solutions of simple cyclic, heterocyclic and aromatic amines was measurd with a Du Nouy tensiometer at 25°C and the results discussed in terms of structure-aggrgation relationships.The simple compounds used in this study were piperazine, piperidine, morpholine 3-methylpyridine, cyclohexylamine and benzylamine, with carbon numbers ranging from four to seven.Piperazine, piperidine and morpholine did not form micellr associatins but cyclohexylamine, benxylamine and 3-methylpyridine did, indicating that more than six-carbons are necessary to form micellar associations, at least for compounds having a six-membered ring.

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