Kinetic studies of the micelle system of octylammonium alkanoates in hexane solution by the ultrasonic absorption method.
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概要
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Ultrasonic absorption was measured in hexane solutions of octylammonium alkanoates (nonanoate, decanoate, dodecanoate, and tetradecanoate). The value of critical micelle concentration (CMC) was determined to be 0.02 M (1 M=1 mol dm<SUP>−3</SUP>) for all the surfactants. The excess ultrasonic absorption, observed in the solutions above the CMC, was ascribed to the association-dissociation of the monomer to and from the micelle. From the concentration dependences of the ultrasonic parameters, the mean aggregation number of the micelle, the rate constants, and the enthalpy change of the above reaction were obtained. These results were discussed in relation to the shape of the reversed micelle and the solute-solvent interactions.
- 公益社団法人 日本化学会の論文
著者
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Harada Shoji
Department Mechanical Engineering Kyushu Institute Of Technology
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Yasunaga Tatsuya
Department of Chemistry, Faculty of Science, Hiroshima University
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Yamashita Teruyo
Daiichi College of Pharmaceutical Science
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Yano Hiroshige
Daiichi College of Pharmaceutical Science
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