On the solid–liquid phase diagrams of binary mixtures of even saturated fatty alcohols: Systems exhibiting peritectic reaction

• Published in: Thermochimica acta 2014-08, Vol.589, p.137-147
• Main Authors: Carareto, Natália D.D., dos Santos, Adenílson O., Rolemberg, Marlus P., Cardoso, Lisandro P., Costa, Mariana C., Meirelles, Antonio J.A.
• Format: Article
• Language: English
• Subjects: Alcohols; Binary mixtures; Complement; Differential scanning calorimetry; Diffraction; DSC; Eutectic reactions; Fatty alcohols; Phase diagrams; Solid–liquid equilibrium; Stepscan DSC; X-ray diffraction
• ISSN: 0040-6031; 1872-762X
• DOI: 10.1016/j.tca.2014.05.022

•SLE of binary mixtures of saturated fatty alcohols was studied.•Experimental data were obtained using DSC and stepscan DSC.•Microscopy and X-ray diffraction used as complementary techniques.•Systems presented eutectic, peritectic and metatectic points. The solid–liquid phase diagrams of the following binary mixtures of even saturated fatty alcohols are reported in the literature for the first time: 1-octanol (C8OH)+1-decanol (C10OH), 1-decanol+1-dodecanol (C12OH), 1-dodecanol+1-hexadecanol (C16OH) and 1-tetradecanol (C14OH)+1-octadecanol (C18OH). The phase diagrams were obtained by differential scanning calorimetry (DSC) using a linear heating rate of 1Kmin−1 and further investigated by using a stepscan DSC method. X-ray diffraction (XRD) and polarized light microscopy were also used to complement the characterization of the phase diagrams which have shown a complex global behavior, presenting not only peritectic and eutectic reactions, but also the metatectic reaction and partial immiscibility on solid state.