Abstract
This contribution is focused on the examination of adsorption/desorptiom isotherms for nitrogen at 77 K and benzene vapors at 293 K on various hypercrosslinked polystyrene (HP) resins. All isotherms for N2 are identical in their shapes and are characterized by a steep rise of the adsorption branch at low p/p0 followed by a less steep hoisting of the branch with increasing relative pressure. Adsorption isotherm for benzene demonstrates an ill-defined convex initial part followed by a significant rise in network loading with further increase in relative pressure. In the both cases we assume the rise in adsorption to reflect the relaxation of inner stresses with the simultaneous increase in the volume of networks. The distinction between the two types of isotherms is conditioned upon the fact that in the networks cooled down to 77 K stresses are stronger and the initial volume of the sample is more compressed. The amounts of nitrogen and benzene absorbed at relative pressure of 0.95 are the same order of magnitude, indicating similar swelling of HP in the both adsorbates. The adsorption behaviors of hypercrosslinked PIM-type polymers are governed by the same effects.
This is a preview of subscription content, log in via an institution to check access.
REFERENCES
S. V. Rogozhin, V. A. Davankov, and M. P. Tsyurupa, U.S. Patent No. 3 729 457, (1971).
M. Thommes, K. Kaneko, A. V. Neimark, et al., Pure Appl. Chem. 87 (9–10), 1051 (2015).
V. A. Davankov and M. P. Tsyurupa, Hypercrosslinked Polymeric Networks and Adsorbing Materials. Comprehensive Analytical Chemistry (Elsevier, New York, 2011), Vol. 56.
M. P. Tsyurupa, Z. K. Blinnikova, M. M. Ilyin, V. A. Davankov, O. O. Parenago, O. I. Pokrovskii, and O. I. Ysovich, Russ. J. Phys. Chem. 89 (11), 1802 (2015).
A. Yu. Popov, Z. K. Blinnukova, M. P. Tsyurupa, and V. A. Davankov, Polym. Sci., Ser. B 60 (5), 408 (2018).
A. P. Karnaykhov, Adsorption. Texture of Disperse and Porous Materials (Nauka, Novosibirsk, 1999).
J. Gregg and K. S. Sing, Adsorption. Surface Area and Porosity (Academic press, New York, 1984).
J. Jeromenok and J. Weber, Langmuir 29, 12982 (2013).
J. Jens Weber, J. Schmidt, A. Thomas, and V. Bohlmann, Langmuir 26 (19), 15650 (2010).
J. Weber, M. Antonietti, and A. Thomas, Macromolecules 41, 2880 (2008).
ACKNOWLEDGMENTS
This work was performed with the financial support from Ministry of Science and Higher Education of the Russian Federation using the equipment of Center for molecular composition studies of INEOS RAS. The authors are grateful to Dr. B. Saifutdinov for measuring adsorption isotherms for nitrogen and benzene vapors on microbeaded hypercrosslinked polystyrene samples.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
The authors declare that they have no conflicts of interest.
Rights and permissions
About this article
Cite this article
Davankov, V.A., Blinnikova, Z.K., Popov, A.Y. et al. Revisiting the Problem of Adsorption/Desorption Isotherms on Hypercrosslinked Polymers. Polym. Sci. Ser. A 65, 15–21 (2023). https://doi.org/10.1134/S0965545X23700682
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0965545X23700682