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Membranes 2015, 5(2), 214-227; doi:10.3390/membranes5020214

Free Volume and Gas Permeation in Anthracene Maleimide-Based Polymers of Intrinsic Microporosity

1
Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany
2
Institute of Physical Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany
3
Institute of Materials Science, University of Kiel, Technical Faculty, Chair for Multicomponent Materials, Kaiserstr. 2, 24143 Kiel, Germany
4
Institut für Angewandte Physik und Messtechnik, Universität der Bundeswehr München, 85577 Neubiberg, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Johannes C. Jansen
Received: 10 March 2015 / Accepted: 20 May 2015 / Published: 28 May 2015
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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. View Full-Text
Keywords: polymer of intrinsic microporosity; free volume; antharcene maleimide; membranes; PALS polymer of intrinsic microporosity; free volume; antharcene maleimide; membranes; PALS
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MDPI and ACS Style

Khan, M.M.; Filiz, V.; Emmler, T.; Abetz, V.; Koschine, T.; Rätzke, K.; Faupel, F.; Egger, W.; Ravelli, L. Free Volume and Gas Permeation in Anthracene Maleimide-Based Polymers of Intrinsic Microporosity. Membranes 2015, 5, 214-227.

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