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Water sorption characteristics in moderately hydrophilic polymers, Part 1: Effect of polar groups concentration and temperature in water sorption in aromatic polysulfones
Author(s) -
GaudichetMaurin E.,
Thominette F.,
Verdu J.
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.24873
Subject(s) - sorption , solubility , polymer , dissolution , polymer chemistry , hydrogen bond , thermodynamics , sulfone , polar , hildebrand solubility parameter , materials science , chemistry , organic chemistry , molecule , adsorption , physics , astronomy
The water equilibrium concentration has been determined for three aromatic polysulfones differentiated essentially by the sulfone concentration, in the 0–0.9 activity range, at temperatures of 50, 60, and 70°C, using a dynamic vapor sorption apparatus. In all the cases, Henry's law was obeyed. The corresponding solubility S and heat of dissolution H s were determined and their relationships with structure were investigated. The fact that S increases nonlinearly with the sulfone concentration and that H s is also an increasing function of the latter leads one to abandon classical approaches to polymer–water interactions and propose a model in which water is doubly bonded. Then, S depends on the distribution of distances between polar groups, characterized by a function P(r) and H s depends on both P(r) and the hydrogen bond potential U(r) . © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008