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Low pressure CO 2 sorption in poly(vinyl cyclohexane‐carboxylate)
Author(s) -
Hirose Takuji,
Mizoguchi Keishin,
Kamiya Yoshinori
Publication year - 1987
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.1987.070340424
Subject(s) - sorption , gravimetric analysis , cyclohexane , diffusion , polymer chemistry , solubility , glass transition , materials science , thermodynamics , analytical chemistry (journal) , chemistry , polymer , organic chemistry , adsorption , physics
A gravimetric method was applied to determine the solubility of CO 2 in poly(vinyl cyclohexanecarboxylate) below 1 atm. The temperatures were varied from 5 to 85°C, above and below the glass transition temperature. The sorption isotherms were concave to the pressure axis below T g and they were tentatively analyzed by the dual‐mode sorption model. Above T g , the isotherms were linear and described by the Henry's law. Below 75°C, the diffusion coefficients of CO 2 were also obtained from the half‐time of the sorption process.