| Autor: |
Nevin, C. S., Althouse, P. M., Triebold, H. O. |
| Zdroj: |
Journal of the American Oil Chemists' Society; August 1951, Vol. 28 Issue: 8 p325-327, 3p |
| Abstrakt: |
Methyl esters of saturated naturally occurring fat acids from C6through C18were prepared and purified by fractional distillation. Refractive indices were used as a measure of their purity. A micro surface tension apparatus was constructed to comply with a modified capillary rise method devised by Ferguson. The surface tensions of water and of benzene were determined at several temperatures. The results obtained compared quite favorably with the values listed in the International Critical Tables. The surface tensions of the methyl esters were determined at 40°C., 60°C., and 80°C. with an accuracy of ±0.15 dynes/cm. Similar to other homologous series the surface tensions of the fat acid methyl esters decrease with increasing temperature, apparently in a linear manner. As the molecular weight of the methyl ester series increases, the surface tension also increases. Close correlation is shown for the methyl esters between the calculated parachors based upon Gibling's system of values and the experimental parachors. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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