1. Free Volume and Gas Permeation in Anthracene Maleimide-Based Polymers of Intrinsic Microporosity
- Author
-
Thomas Emmler, L. Ravelli, Volker Abetz, Franz Faupel, Muntazim Munir Khan, Toenjes Koschine, Werner Egger, Volkan Filiz, and Klaus Rätzke
- Subjects
Materials science ,Filtration and Separation ,Permeance ,lcsh:Chemical technology ,Article ,chemistry.chemical_compound ,Thin-film composite membrane ,Polymer chemistry ,Copolymer ,Chemical Engineering (miscellaneous) ,lcsh:TP1-1185 ,lcsh:Chemical engineering ,Maleimide ,ddc:620.11 ,Anthracene ,polymer of intrinsic microporosity ,Process Chemistry and Technology ,lcsh:TP155-156 ,Permeation ,Membrane ,Chemical engineering ,Volume (thermodynamics) ,chemistry ,membranes ,PALS ,free volume ,antharcene maleimide - 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.
- Published
- 2015
- Full Text
- View/download PDF