Nanoporosity of Polymer Sorbents and Membrane Materials as Seen by PALS and Low Temperature Gas Sorption
V.P. Shantarovich, V.G. Bekeshev, I.B. Kevdina, Yu.P. Yampolskii, M.V. Bermeshev and N.A. Belov
aSemenov Institute of Chemical Physics RAS, Kosygin st. 4, 119991 Moscow, Russia
bTopchiev Institute of Petrochemical Synthesis, RAS, Leninskii Prosp. 29, 119991 Moscow, Russia
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The limits of application of positron annihilation lifetime spectroscopy and low temperature gas sorption for studying nanoporosity of polymer sorbents and membrane materials are discussed relying on the results previously obtained by the authors. For the two methods, limitations are determined by different factors: the dispersion of the material is essential for low temperature gas sorption, while concentration of nanopores of given size is important for positron annihilation lifetime spectroscopy. The both methods came out to be a useful addition to each other in the studies of micropores and mesopores.

DOI: 10.12693/APhysPolA.132.1548
PACS numbers: 78.70.Bj, 61.43.Gt