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Some Physicochemical Studies on Organic Analog of Metal‐Nonmetal Eutectics

Phase diagram, growth behaviour, thermochemistry and microstructure of organic analog of metal‐nonmetal systems, namely, urea‐succinonitrile system and diphenyl‐neopentyl alcohol system, were studied. While phase diagram study shows the formation of simple eutectic in each case, the growth kinetics investigations suggest the applicability of Hillig‐Turnbull equation to these systems. The values of entropy of fusion, enthalpy of mixing, Jackson's roughness parameter, interfacial energy and excess thermodynamic functions were calculated using enthalpy of fusion values determined by the DSC method. The microstructure of eutectics were found to be significantly different from those of the parent components.