Dresden 2003 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 20: POSTER A
CPP 20.26: Poster
Montag, 24. März 2003, 19:00–21:00, ZEU/250
Nanostructure and gas transport in polyether-block-polyamide copolymer membranes — •Veroni Barbi1, Sérgio S. Funari2, Rainer Gehrke3, Nico Scharnagl4, and Norbert Stribeck1 — 1Institute of Technical and Macromolecular Chemistry, University of Hamburg, Hamburg, Germany — 2Max–Planck–Institute of Colloids and Interfaces, c/o HASYLAB at DESY, Hamburg, Germany — 3HASYLAB at DESY, Hamburg, Germany — 4GKSS Research Center, Geesthacht, Germany
Membranes from polyether-block-polyamide (PEBA) polymers with varying chemical composition cast from n-butanol and cyclohexanol are studied by small–angle X–ray scattering (SAXS), dry and water–swollen, and as a function of strain. The nanostructure from soft and hard domains is determined. The typical hard domain diameter is 6 nm, the long period 17 nm for all grades. Gas transport parameters (permeability, diffusivity, solubility) are determined for He, H2, CO2, O2, N2 and CH4. Increase of polyether domain thickness leads to an increased permeability, but imperfect microphase separation contributes to gas transport properties in the same order of magnitude[1].
[1] Barbi, V.; Funari, S. S.; Gehrke, R.; Scharnagl, N.; Stribeck, N (2003) Macromolecules, in print