| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 674511 | Thermochimica Acta | 2011 | 5 Pages |
The vapor pressure of a series of perfluoropolyethers (PFPEs) was estimated from the weight loss measured in a standard thermogravimetric analyzer (TGA). A relation linking the coefficients describing the vapor pressure dependence on temperature to the molecular weight was obtained from the data measured on fractions with a narrow molecular weight distribution. Based on this relation, a simple method predicting the vapor pressure of a mixture of PFPEs from the molecular weight distribution can be applied to the whole range of grades.
► TGA standard equipment can be used to estimate vapor pressure and enthalpy of vaporization. ► The vapor pressure of a series of PFPEs was measured to obtain the enthalpies of vaporization. ► A general Clausius Clapeyron's relation can be established with parameters depending on the molecular weight. ► The obtained relation is checked on samples with broad molecular weight distribution.
