title: Free volume and gas permeation in anthracene maleimide-based polymers of intrinsic microporosity.
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.
authors.affiliation: Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany. muntazim.khan@hzg.de.
authors.forename: Muntazim Munir
authors.initials: MM
authors.lastname: Khan
authors.affiliation: Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany. volkan.filiz@hzg.de.
authors.forename: Volkan
authors.initials: V
authors.lastname: Filiz
authors.affiliation: Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany. thomas.emmler@hzg.de.
authors.forename: Thomas
authors.initials: T
authors.lastname: Emmler
authors.affiliation: Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany. volker.abetz@hzg.de.|Institute of Physical Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany. volker.abetz@hzg.de.
authors.forename: Volker
authors.initials: V
authors.lastname: Abetz
authors.affiliation: Institute of Materials Science, University of Kiel, Technical Faculty, Chair for Multicomponent Materials, Kaiserstr. 2, 24143 Kiel, Germany. tk@tf.uni-kiel.de.
authors.forename: Toenjes
authors.initials: T
authors.lastname: Koschine
authors.affiliation: Institute of Materials Science, University of Kiel, Technical Faculty, Chair for Multicomponent Materials, Kaiserstr. 2, 24143 Kiel, Germany. kr@tf.uni-kiel.de.
authors.forename: Klaus
authors.initials: K
authors.lastname: Rätzke
authors.affiliation: Institute of Materials Science, University of Kiel, Technical Faculty, Chair for Multicomponent Materials, Kaiserstr. 2, 24143 Kiel, Germany. ff@tf.uni-kiel.de.
authors.forename: Franz
authors.initials: F
authors.lastname: Faupel
authors.affiliation: Institut für Angewandte Physik und Messtechnik, Universität der Bundeswehr München, 85577 Neubiberg, Germany. werner.egger@unibw.de.
authors.forename: Werner
authors.initials: W
authors.lastname: Egger
authors.affiliation: Institut für Angewandte Physik und Messtechnik, Universität der Bundeswehr München, 85577 Neubiberg, Germany. luca.ravelli@unibw.de.
authors.forename: Luca
authors.initials: L
authors.lastname: Ravelli
keywords: PALS; antharcene maleimide; free volume; membranes; polymer of intrinsic microporosity