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Solubility of alkanes in a polystyrene matrix
Author(s) -
Bernardo Gabriel,
Vesely Drahosh
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.28758
Subject(s) - solubility , polystyrene , enthalpy , thermodynamics , gravimetric analysis , sorption , hildebrand solubility parameter , flory–huggins solution theory , chemistry , alkane , matrix (chemical analysis) , polymer chemistry , materials science , polymer , hydrocarbon , organic chemistry , chromatography , physics , adsorption
The solubilities of seven alkanes in a matrix of uncrosslinked polystyrene were measured at several different temperatures. A gravimetric method reported earlier was used to monitor the sorption of the solvents. The experimental measurements showed unambiguously that the solubility of the alkanes diffusing into a polystyrene matrix reached a constant and reproducible value typical for each system and temperature. These values could be interpreted very well with the Flory–Huggins solubility parameter (χ = a (entropic contribution to x ) + b (enthalpic contribution to x )/ T [absolute temperature in Kelvin (K)]) or with the van't Hoff equation (ln K S = Δ S / R (gas constant) − Δ H / RT , where K S is the equilibrium constant, Δ S is the entropy change, and Δ H is the enthalpy change). © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008