INFLUENCE OF MELT OVERHEATING NAPHTHALENE, DIPHENYL AND DIBENZYL ON CRYSTALLIZATION

V.D. Aleksandrov, O.A. Pokyntelytsia

DOI: 10.26456/pcascnn/2014.6.004

Original article

Abstract: A sharp change in naphthalene, diphenyl, and dibenzyl crystallization behavior from the equilibrium without overcooling to the nonequilibrium-explosive with overheating was determined bythermoanalysis. The  crystallization behavior depends on liquid phase overheating relative to the melting temperature. An average amount of the overheating that practically does not depend both on further overheating and number of heating – cooling cycles were calculated. A range of kinetic and thermodynamic parameters of crystallization was calculated using thermograms. By X-ray diffraction and optical microscopy changes in crystal structure were detected depending on the type of crystallization.

Keywords: naphthalene, diphenyl, dibenzyl, thermal analysis, melt overheat, subcooling, equilibrium and nonequilibrium crystallization, crystal structure, crystallization parameters

• V.D. Aleksandrov
• O.A. Pokyntelytsia

Reference:

Aleksandrov V.D., Pokyntelytsia O.A. Vliyanie peregreva rasplavov naftalina, difenila, dibenzila na ikh kristallizatsiyu [INFLUENCE OF MELT OVERHEATING NAPHTHALENE, DIPHENYL AND DIBENZYL ON CRYSTALLIZATION], Fiziko-khimicheskie aspekty izucheniya klasterov, nanostruktur i nanomaterialov [Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials], 2014, issue 6, pp. 4-14. DOI: 10.26456/pcascnn/2014.6.004. ⎘

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