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Titolo:
Physical chemistry of binary organic eutectic and monotectic alloys; durene-pyrogallol system
Autore:
Rai, US; Pandey, P;
Indirizzi:
Banaras Hindu Univ, Fac Sci, Dept Chem, Varanasi 221005, Uttar Pradesh, India Banaras Hindu Univ Varanasi Uttar Pradesh India 221005 tar Pradesh, India
Titolo Testata:
THERMOCHIMICA ACTA
fascicolo: 1-2, volume: 364, anno: 2000,
pagine: 111 - 119
SICI:
0040-6031(200012)364:1-2<111:PCOBOE>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOLIDIFICATION BEHAVIOR; ADDITION-COMPOUNDS; P-NITROPHENOL; GROWTH; AMINOPHENOL; RESORCINOL; BENZIDINE; INTERFACE; MELTS; ACID;
Keywords:
durene-pyrogallol system; optical microphotographs; enthalpy;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Rai, US Banaras Hindu Univ, Fac Sci, Dept Chem, Varanasi 221005, Uttar Pradesh, India Banaras Hindu Univ Varanasi Uttar Pradesh India 221005 esh, India
Citazione:
U.S. Rai e P. Pandey, "Physical chemistry of binary organic eutectic and monotectic alloys; durene-pyrogallol system", THERMOC ACT, 364(1-2), 2000, pp. 111-119

Abstract

The phase-diagram of durene-pyrogallol system, determined by the thaw-meltmethod, shows the formation of a eutectic at 79.6 degreesC and a monotectic at 127.7 degreesC containing 0.95 and 0.05 mol fractions of durene, respectively. Growth data for the pure components, the eutectic and the monotectic, determined by measuring the rate of movement of solid-liquid interface in a capillary at different undercoolings (DeltaT) suggest the applicability of Hillig-Turnbull equation, nu = u(DeltaT)(n), where u and n are constants depending on the nature of materials involved. The values of enthalpy offusion of the pure components, the eutectic and the monotectic were determined and from these values, the enthalpy of mixing, size of the critical nucleus, interfacial energy and excess thermodynamic functions were calculated. While optical microphotographs of the pure components showed a faceted microstructure, those of eutectic and monotectic show their characteristic features. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 05:46:06