posted on 2024-01-08, 14:05authored byFerruccio Doghieri
The first implementation is presented for the Restrained
Swelling
(RS) version of the Nonequilibrium Thermodynamics for Glassy Polymers
(NET-GP) approach, which counts on the PC-SAFT EoS to express the
equilibrium properties of polymer-solute mixtures. Examples for application
of the resulting model (NE-RS) PC-SAFT to the prediction of gas and
vapor solubility in conventional glassy polymers are first discussed.
Emphasis is put on the role of pVT properties for pure polymer species,
as measured at both melt and glass conditions. The first application
is then presented for the NE-RS approach to the analysis of gas and
vapor solubility data in a polymer with intrinsic microporosity, for
which pVT data in the melt phase cannot be measure and reliable values
for the volumetric properties at glassy conditions are not available.
In the latter analysis, both kinds of pVT properties are eventually
retrieved from the best fit of the selected solubility data and the
result for the polymer pVT characteristics are finally compared with
those recently presented in the literature as obtained after the use
of “Dry Glass Reference Perturbation Theory“ (DGRPT),
within the same NET-GP approach.