THERMODYNAMIC STUDY ON PENETRATION OF PENTADECANOIC ACID MONOLAYER BY DODECYLAMMONIUM CHLORIDE.

Yoshiteru Hayami, Makoto Aratono, Shozo Uryu, Kinsi Motomura, Ryohei Matuura

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Abstract

In order to show that thermodynamic treatment is useful in the study on the monolayer penetration, the surface tension has been measured with the system consisting of pentadecanoic acid monolayer and dodecylammonium chloride solution. Applying the thermodynamic equations to the experimental data, the surface density of dodecylammonium chloride, and entropy and energy of penetration have been estimated numerically. It has been found that the surface density, entropy, and energy all decrease with increasing the concentration of film-forming substance. Therefore, it has been concluded that the penetration of monolayer of this system is caused by the decrease of the energy of penetration which compensates the decrease of the entropy of penetration.

Original languageEnglish
Pages (from-to)1950-1953
Number of pages4
JournalBulletin of the Chemical Society of Japan
Volume56
Issue number7
DOIs
Publication statusPublished - Jan 1 1983
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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