Homopolymer (m:n = 1:0) and copolymer (m:n = 3:1, 1:1,

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. No MeSH data available. Related in: MedlinePlus	© Copyright Policy Related In: Results - Collection License Show All Figures getmorefigures.php?uid=PMC4496641&req=5 membranes-05-00214-f002: Homopolymer (m:n = 1:0) and copolymer (m:n = 3:1, 1:1, 1:2.3) of comonomer 4bIII. Mentions: From our previous studies [37], the copolymer of anthracene maleimide obtained from the comonomer 4b-III (Figure 2) shows a gas separation performance comparable to PIM-1. Motivated by this result, to fully understand the properties of the copolymers, we investigated the free volume behavior of these copolymers using positron annihilation lifetime spectroscopy (PALS) to clearly correlate the increase in permeability with the change in free volume and average hole size.

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.

No MeSH data available.

Related in: MedlinePlus

Homopolymer (m:n = 1:0) and copolymer (m:n = 3:1, 1:1, 1:2.3) of comonomer 4bIII.

Related In: Results - Collection

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membranes-05-00214-f002: Homopolymer (m:n = 1:0) and copolymer (m:n = 3:1, 1:1, 1:2.3) of comonomer 4bIII.

Mentions: From our previous studies [37], the copolymer of anthracene maleimide obtained from the comonomer 4b-III (Figure 2) shows a gas separation performance comparable to PIM-1. Motivated by this result, to fully understand the properties of the copolymers, we investigated the free volume behavior of these copolymers using positron annihilation lifetime spectroscopy (PALS) to clearly correlate the increase in permeability with the change in free volume and average hole size.