TY - JOUR
T1 - Effects of time, temperature, and pressure in the vicinity of the glass transition of a swollen polymer
AU - Ogieglo, Wojciech
AU - Upadhyaya, Lakshmeesha
AU - Wessling, Matthias
AU - Nijmeijer, Arian
AU - Benes, Nieck E.
PY - 2014
Y1 - 2014
N2 - In-situ spectroscopic ellipsometry is used for the dynamic study of thermally perturbed thin polystyrene films, swollen with n-octane or n-decane. The thermal evolution of the swollen films reveals pronounced changes both in equilibrium and kinetic properties. Upon vitrification, a kinetically arrested swollen matrix isobserved. This phenomenon is related to the excess energy term in the chemical potential of the solvent, associated with the non-equilibrium status of the swollen polymer matrix. The swollen polystyrene – n-decane system shows no measurable compression when exposed to hydrostatic pressures up to 50 bar, neither above or below the glass transition temperature. A slight compression is observed for a glassy polystyrene film in pressurized water. This compression corresponds to partial relaxation of excess free volume. The results are of importance for membrane applications in which penetrant-swollen polymer membrane layers are operated under high pressures.
AB - In-situ spectroscopic ellipsometry is used for the dynamic study of thermally perturbed thin polystyrene films, swollen with n-octane or n-decane. The thermal evolution of the swollen films reveals pronounced changes both in equilibrium and kinetic properties. Upon vitrification, a kinetically arrested swollen matrix isobserved. This phenomenon is related to the excess energy term in the chemical potential of the solvent, associated with the non-equilibrium status of the swollen polymer matrix. The swollen polystyrene – n-decane system shows no measurable compression when exposed to hydrostatic pressures up to 50 bar, neither above or below the glass transition temperature. A slight compression is observed for a glassy polystyrene film in pressurized water. This compression corresponds to partial relaxation of excess free volume. The results are of importance for membrane applications in which penetrant-swollen polymer membrane layers are operated under high pressures.
KW - 2023 OA procedure
U2 - 10.1016/j.memsci.2014.04.013
DO - 10.1016/j.memsci.2014.04.013
M3 - Article
SN - 0376-7388
VL - 464
SP - 80
EP - 85
JO - Journal of membrane science
JF - Journal of membrane science
ER -