Fatty acids methyl esters: Complementary measurements and comprehensive analysis of vaporization thermodynamics

Vapour pressures of methyl decanoate, methyl undecanoate, methyl tetradecanoate, methyl hexadecanoate and methyl octadecanoate were measured by using the static technique. Vapour pressures of methyl dodecanoate, methyl tridecanoate, methyl tetradecanoate, methyl heptadecanoate, and methyl octadecanoate were measured by using the transpiration method. In the present work, vapour pressures of methyl esters of the saturated fatty acids from methyl propanoate to methyl eicosanoate were collected from the literature. These data together with own complementary results were used for validation of methods for assessment of the difference Delta C-g(1)p,m(0) required for the correct adjustment of vaporization enthalpies to the reference temperature 298.15 K. The evaluated vaporization enthalpies for esters from methyl propanoate to methyl eicosanoate demonstrate impeccable linear chain-length dependence. The CH2 group contributions for different homologous series were derived and compared. Quantitative analysis of dispersion interactions in the long-chained esters have been performed. (C) 2019 Elsevier Ltd.