Mixed monolayers of long normal-chain fatty acids with long normal alkyl esters. III. Pentadecanoic acid-esters system.
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概要
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The surface pressures of mixed monolayers of pentadecyl acetate, hexadecyl acetate, heptadecyl acetate, and hexadecyl propionate with pentadecanoic acid were measured at various compositions and temperatures. The two-dimensional phase diagram and apparent molar entropy and energy changes were evaluated by means of a previously described thermodynamic treatment. They depend uniquely on the molecular structure of the film-forming substances and on the composition in the mixed monolayer. The phase diagrams of pentadecanoic acid–pentadecyl acetate and pentadecanoic acid–hexadecyl acetate systems are of a complicated type. There are positive and negative regions in the excess apparent molar energy changes. The pentadecanoic acid–heptadecyl acetate and pentadecanoic acid–hexadecyl propionate systems are of the positive azeotropic type. The excess apparent molar energy changes are positive over the whole range of mole fractions.
- 公益社団法人 日本化学会の論文
著者
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Motomura Kinsi
Department Of Chemistry Faculty Of Science Kyushu University
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Matuura Ryohei
Department of Chemistry Faculty of Science Kyushu University
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Motomura Kinsi
Department of Chemistry, Faculty of Science, Kyushu University 33
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Matuo Hirosi
Department of Chemistry, Faculty of Science, Kyushu University 33
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