Abstract
Phase diagram, growth kinetics, thermal behaviour and microstructure of a monotectic system involving a non-metal-non-metal binary organic analogue are discussed here. The eutectic, monotectic and consolute temperatures are: 87.1, 107.2 and 149.0°C respectively, at 0.968, 0.154 and 0.521 mole fractions of 1,4-dibromobenzene. The upper consolute temperature lies 41.8°C above the monotectic horizontal. Growth kinetics data of the pure and binary materials show the obeyence of Hillig-Turnbull equation. Enthalpy of fusion data obtained from Mettler DSC-4000 was used to calculate the heat of mixing, entropy of fusion, Jackson's roughness parameter, excess thermodynamic functions, interfacial energy and radius of critical nucleus. The optical microphotographs of the eutectic and monotectic show their characteristic features.
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