Abstract
Temperature dependence of the dielectric constant of oleic acid with different degrees of purity was measured in the 233–313 K range. It was observed that the presence of impurities (palmitic and linolenic acids) strongly influences the dielectric constant, melting point and dipole moment of the oleic acid. The values of apparent dipole moment and the Kirkwood correlation parameters were evaluated using the Kirkwood's model and were estimated to be about 1.20, 1.61 and 2.27 D, respectively for 60, 90 and 97 wt% oleic acid.
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