Correlating vapor pressures of perfluorinated saturated hydrocarbons by a group contribution method

The normal boiling points and vapor pressure/temperature relationship of a series of perfluorinated saturated hydrocarbons have been correlated by using a group contribution approach. The fundamental equation, derived from a physical model that describes any subject molecule as a set of coupled harm...

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Journal Title: Industrial and Engineering Chemistry Research Vol. 27; no. 9; pp. 1732 - 1736
Authors: C. Michael Kelly, Paul M. Mathias, Frank K. Schweighardt
Format: Article
Published: 1988
Subjects:
Summary: The normal boiling points and vapor pressure/temperature relationship of a series of perfluorinated saturated hydrocarbons have been correlated by using a group contribution approach. The fundamental equation, derived from a physical model that describes any subject molecule as a set of coupled harmonic oscillators, contains only two adjustable parameters. Group contributions to these adjustable parameters were determined from an extensive published data base, by minimizing the least-square errors between the model prediction and observed normal boiling points or vapor pressure data. The model successfully correlates boiling points within 2 percent of the absolute normal boiling point and vapor pressure under vacuum over a pressure range of approximately 10-100 mmHg (0.2-20 kPa) for the compounds tested.
ISSN: 0888-5885