Free volume and gas permeation in anthracene maleimide-based polymers of intrinsic microporosity

Muntazim Munir Khan; Volkan Filiz; Thomas Emmler; Volker Abetz; Toenjes Koschine; Klaus Rätzke; Franz Faupel; Werner Egger; Luca Ravelli

doi:10.3390/membranes5020214

Free volume and gas permeation in anthracene maleimide-based polymers of intrinsic microporosity

Membranes (Basel). 2015 May 28;5(2):214-27. doi: 10.3390/membranes5020214.

Authors

Muntazim Munir Khan¹, Volkan Filiz², Thomas Emmler³, Volker Abetz^{4

5}, Toenjes Koschine⁶, Klaus Rätzke⁷, Franz Faupel⁸, Werner Egger⁹, Luca Ravelli¹⁰

Affiliations

¹ Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany. muntazim.khan@hzg.de.
² Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany. volkan.filiz@hzg.de.
³ Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany. thomas.emmler@hzg.de.
⁴ Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany. volker.abetz@hzg.de.
⁵ Institute of Physical Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany. volker.abetz@hzg.de.
⁶ Institute of Materials Science, University of Kiel, Technical Faculty, Chair for Multicomponent Materials, Kaiserstr. 2, 24143 Kiel, Germany. tk@tf.uni-kiel.de.
⁷ Institute of Materials Science, University of Kiel, Technical Faculty, Chair for Multicomponent Materials, Kaiserstr. 2, 24143 Kiel, Germany. kr@tf.uni-kiel.de.
⁸ Institute of Materials Science, University of Kiel, Technical Faculty, Chair for Multicomponent Materials, Kaiserstr. 2, 24143 Kiel, Germany. ff@tf.uni-kiel.de.
⁹ Institut für Angewandte Physik und Messtechnik, Universität der Bundeswehr München, 85577 Neubiberg, Germany. werner.egger@unibw.de.
¹⁰ Institut für Angewandte Physik und Messtechnik, Universität der Bundeswehr München, 85577 Neubiberg, Germany. luca.ravelli@unibw.de.

Abstract

High free-volume copolymers were prepared via polycondensation with 2,3,5,6,-tetrafluoroterephthalonitrile (TFTPN) in which a portion of the 3,3,3',3'-tetramethyl-1,1'-spirobisindane (TTSBI) of PIM-1 was replaced with dibutyl anthracene maleimide (4bIII). An investigation of free volume using positron annihilation lifetime spectroscopy (PALS), and gas permeation measurements was carried out for the thin film composite copolymer membranes and compared to PIM-1. The average free volume hole size and the gas permeance of the copolymer membranes increased with decreasing TTSBI content in the copolymer.

Keywords: PALS; antharcene maleimide; free volume; membranes; polymer of intrinsic microporosity.