EFFECT OF IMPURITIES ON THE DIELECTRIC PROPERTIES OF OLEIC ACID

作     者：F.F.DE SOUSA P.T.C.FREIRE J.MENDES FILHO A.C.OLIVEIRA E.LONGHINOTTI P.H.M.DE VASCONCELOS G.D.SARAIVA S.G.C.MOREIRA P.ALCANTARA Jr. 

作者机构：Faculdade de Cincias Exatas e Naturais Universidade Federal do ParaCEP 68.507-970 Maraba-PABrazil Departamento de FisicaUniversidade Federal do Ceara CEP 60.455-760Fortaleza-CEBrazil Universidade Federal do Ceara Campus do Pici-Bloco 940 Langmuir Lab.de Adsorcao e Catalise CEP 60.000-000Fortaleza-CEBrazil Faculdade de Educacao Ciencias e Letras do Sertao Central Universidade Estadual do CearaCEP 63.900-000 Quixada-CEBrazil Faculdade de FisicaUniversidade Federal do Para CEP 66.075-110Bel
em-PABrazil 

出 版 物：《Journal of Advanced Dielectrics》 (先进电介质学报（英文）)

年 卷 期：2012年第2卷第3期

页      面：47-54页

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

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 

主　　题：Oleic acid dielectric properties fatty acids Kirkwood's theory. 

摘      要：Temperature dependence of the dielectric constant of oleic acid with different degrees of puritywas measured in the 233-313 K *** was observed that the presence of impurities(palmiticand linolenic acids)strongly influences the dielectric constant,melting point and dipole moment of the oleic *** 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.