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

Khan MM, Filiz V, Emmler T, Abetz V, Koschine T, Rätzke K, Faupel F, Egger W, Ravelli L - Membranes (Basel) (2015)

Bottom Line: 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 Article: PubMed Central - PubMed

Affiliation: Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany. muntazim.khan@hzg.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.

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Related in: MedlinePlus

Synthesis of the homopolymer and copolymer of 4b-III (i = K2CO3, DMAc, DEB, 150 °C, 30 min).
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membranes-05-00214-f003: Synthesis of the homopolymer and copolymer of 4b-III (i = K2CO3, DMAc, DEB, 150 °C, 30 min).

Mentions: The comonomer synthesis using a multistep synthetic route and the characterization were described elsewhere [37]. The homopolymer and copolymers were synthesized via aromatic nuleophilic polycondensation reaction by reacting tetrahydroxy monomers with equimolar amounts of TFTPN, catalyzed by an excess of K2CO3, using a modified procedure similar to the synthesis of PIM-1 (Figure 3) [37,51].


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

Khan MM, Filiz V, Emmler T, Abetz V, Koschine T, Rätzke K, Faupel F, Egger W, Ravelli L - Membranes (Basel) (2015)

Synthesis of the homopolymer and copolymer of 4b-III (i = K2CO3, DMAc, DEB, 150 °C, 30 min).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4496641&req=5

membranes-05-00214-f003: Synthesis of the homopolymer and copolymer of 4b-III (i = K2CO3, DMAc, DEB, 150 °C, 30 min).
Mentions: The comonomer synthesis using a multistep synthetic route and the characterization were described elsewhere [37]. The homopolymer and copolymers were synthesized via aromatic nuleophilic polycondensation reaction by reacting tetrahydroxy monomers with equimolar amounts of TFTPN, catalyzed by an excess of K2CO3, using a modified procedure similar to the synthesis of PIM-1 (Figure 3) [37,51].

Bottom Line: 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 Article: PubMed Central - PubMed

Affiliation: Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany. muntazim.khan@hzg.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.

No MeSH data available.


Related in: MedlinePlus