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Titolo:
Vapor pressure determination by thermogravimetry
Autore:
Price, DM;
Indirizzi:
Loughborough Univ Technol, Inst Polymer Technol & Mat Engn, Loughborough LE11 3TU, Leics, England Loughborough Univ Technol Loughborough Leics England LE11 3TU cs, England
Titolo Testata:
THERMOCHIMICA ACTA
, volume: 367, anno: 2001,
pagine: 253 - 262
SICI:
0040-6031(20010308)367:<253:VPDBT>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUBLIMATION; EVAPORATION; STATE; ACID; DSC;
Keywords:
bisphenol-A; dioctyl phthalate; modulated temperature thermogravimetry sublimation; UV absorber; vapor pressure; vaporization;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
48
Recensione:
Indirizzi per estratti:
Indirizzo: Price, DM Loughborough Univ Technol, Inst Polymer Technol & Mat Engn, Loughborough LE11 3TU, Leics, England Loughborough Univ Technol Loughborough Leics England LE11 3TU d
Citazione:
D.M. Price, "Vapor pressure determination by thermogravimetry", THERMOC ACT, 367, 2001, pp. 253-262

Abstract

A method for measuring the vapor pressures of a wide range of materials using a conventional thermobalance and standard sample holders is described. The equipment is calibrated using pure reference materials of known vapor pressure and exploiting the relationship between volatilization rate and vapor pressure based on the Langmuir equation for free evaporation. Enthalpiesof vaporization and sublimation can be determined, in some cases, the melting temperature and enthalpy of fusion can be obtained directly from thermogravimetry. Applications to the study of plasticizers and UV absorbers are described. Poor correlation of experimental results with predicted values obtained by molecular modeling is found. The application of modulated temperature thermogravimetry for the determination of enthalpies of sublimation and vaporization is also explored. (C) 2001 Elsevier Science B.V. All rightsreserved.

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Documento generato il 04/07/20 alle ore 17:01:23