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Prediction of solubilities for volatile hydrocarbons in low‐density polyethylene using UNIFAC‐FV model
Author(s) -
Iwai Yoshio,
Anai Yoshiyuki,
Arai Yasuhiko
Publication year - 1981
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760211507
Subject(s) - unifac , toluene , hydrocarbon , benzene , mass fraction , octane , thermodynamics , fraction (chemistry) , materials science , low density polyethylene , hydrocarbon mixtures , polyethylene , activity coefficient , mole fraction , analytical chemistry (journal) , organic chemistry , chemistry , aqueous solution , physics
The UNIFAC‐FV model has been applied to predict the weight‐fraction Henry's constant of n‐hexane, n‐octane, benzene, and toluene in low‐density polyethylene in the region 124 to 250°C. By adjusting the number of external degrees of freedom per hydrocarbon molecule, the weight‐fraction Henry's constant was correlated with good agreement by the model. Namely, the solubilities of hydrocarbons in the polymer can be obtained correctly from the model at low pressures, less than 2 atm. Although the model is very useful, its applicability is limited to the subcritical temperature range of a volatile hydrocarbon.