摘要
Temperature dependence of the dielectric constant of oleic acid with different degrees of puritywas measured in the 233-313 K range.It was observed that the presence of impurities(palmiticand 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 parameterswere 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.
基金
FFS acknowledges the support from MCT/CNPqEdital 14/2011(process.482495/2011-1)and theauthors thank the Brazilian institutions CAPES,FUNCAP,FAPESPA and CNPq for financial sup-port.Authors also acknowledge Dr.Jeanlex Sousafor a critical reading of the manuscript.
