Vapor Pressures and Accommodation Coefficients of Four Non-Volatile Compounds. The Vapor Pressure of Tri-m-cresyl Phosphate over Polyvinyl Chloride Plastics

Determination of ultra-low vapor pressures by submicron droplet evaporation

“…The Lennard-Jones parameters calculated from Eqs. (15) and (16) are in reasonable agreement with the experimental results.…”

“…14 We have found Eqs. (15) and (16) to be in better agreement with our experimental results than numerous other correlations which have been proposed in the literature.…”

“…and Chen and Othmer 13 proposed the equation (16) where the critical volume Vc can be estimated by the group contribution method of Lydersen. 14 We have found Eqs.…”

Modeling and Measurement of Aryl Phosphate Ester Vapor Pressures at 50°C

“…This result shows that the vapor pressure of the mixture is insensitive to the composition, and that the vapor pressures of the components are very similar, grouped within a factor of 2. It has been shown that the vapor pressures of tri-p-cresyl phosphate and tri-m-cresyl phosphate are very similar (6). Small concentrations of volatile components are inconsequential in our experiments. '…”

“…Under the conditions that the evaporation coefficient is I , and the return rate of gas molecules to the surface is effectively zero because of the Inrge mean-free path under vacuum, it has been shown that the vapor pressure can be calculated from the mass loss rate (5). The accommodation coefficient, a, and, thus, the evaporation coefficient, has been shown to be 1 for aryl phosphate esters (6). Static methods, such as the isoteniscope method, were not chosen because the authors were interested in the rate of mass loss of additives.…”