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Title: Polybenzimidazole based random copolymers containing hexafluoroisopropylidene functional groups for gas separations at elevated temperatures

Authors:
; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1396514
Grant/Contract Number:
18990
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Polymer
Additional Journal Information:
Journal Volume: 119; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-04 09:05:19; Journal ID: ISSN 0032-3861
Publisher:
Elsevier
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Singh, Rajinder P., Li, Xin, Dudeck, Kevin W., Benicewicz, Brian C., and Berchtold, Kathryn A.. Polybenzimidazole based random copolymers containing hexafluoroisopropylidene functional groups for gas separations at elevated temperatures. United Kingdom: N. p., 2017. Web. doi:10.1016/j.polymer.2017.04.075.
Singh, Rajinder P., Li, Xin, Dudeck, Kevin W., Benicewicz, Brian C., & Berchtold, Kathryn A.. Polybenzimidazole based random copolymers containing hexafluoroisopropylidene functional groups for gas separations at elevated temperatures. United Kingdom. doi:10.1016/j.polymer.2017.04.075.
Singh, Rajinder P., Li, Xin, Dudeck, Kevin W., Benicewicz, Brian C., and Berchtold, Kathryn A.. Thu . "Polybenzimidazole based random copolymers containing hexafluoroisopropylidene functional groups for gas separations at elevated temperatures". United Kingdom. doi:10.1016/j.polymer.2017.04.075.
@article{osti_1396514,
title = {Polybenzimidazole based random copolymers containing hexafluoroisopropylidene functional groups for gas separations at elevated temperatures},
author = {Singh, Rajinder P. and Li, Xin and Dudeck, Kevin W. and Benicewicz, Brian C. and Berchtold, Kathryn A.},
abstractNote = {},
doi = {10.1016/j.polymer.2017.04.075},
journal = {Polymer},
number = C,
volume = 119,
place = {United Kingdom},
year = {Thu Jun 01 00:00:00 EDT 2017},
month = {Thu Jun 01 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.polymer.2017.04.075

Citation Metrics:
Cited by: 1work
Citation information provided by
Web of Science

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  • There is compelling need to develop novel separation methods to improve the energy efficiency of synthesis (syn) gas processing operations including H{sub 2} and H{sub 2}/CO production to meet power, chemicals, and fuel producer needs, as well as carbon capture and removal of other undesirable syngas impurities. To be technically and economically viable, a successful separation method must be applicable to industrially relevant gas streams at realistic process conditions and compatible with large gas volumes. H{sub 2} selective membrane technology is a promising method for syngas separations at elevated temperatures (>150 C) that could be positioned upstream or downstream ofmore » one or more of the water-gas-shift reactors (WGSRs) or integrated with a WGSR depending on application specific syngas processing. Polybenzimidazole (PBI)-based polymer chemistries are exceptional candidates for H{sub 2}/CO{sub 2} separations at elevated temperatures. In general, these materials possess excellent chemical resistance, very high glass transition temperatures (> 400 C), good mechanical properties, and an appropriate level of processability. Although commercially available PBI polymers have demonstrated commercially attractive H{sub 2}/CO{sub 2} selectivity, their H{sub 2} permeability is low. Our team s employing structural and chemical manipulations to tailor the polymer free-volume achitecture with the ultimate goal of enhancing H{sub 2} permselectivity while retaining the inherent hermochemical stability characteristics of PBI. We will discuss our synthetic approaches and their influences on the gas transport behavior of these PBI-based materials. In general, a decrease in H{sub 2}/CO{sub 2} selectivity was observed with an increase in H{sub 2} permeability. H{sub 2} permeability and H{sub 2}/CO{sub 2} selectivity at 250 C ranged from 50 to 1000 barrer and 5 to 45, respectively.« less
  • The anionic block copolymerization of 4,4' -vinylphenyl-N,N-bis(4-tert-butylphenyl)benzenamine (A) with furfuryl isocyanate (B) was carried out using potassium naphthalenide (K-Naph) in tetrahydrofuran at -78 and -98 °C to prepare well-defined block copolymers containing furan groups for the formation of thermoreversible networks via a Diels Alder (DA) reaction. While no block copolymerization was observed in the absence of sodium tetraphenylborate (NaBPh 4) due to side reactions, well-defined poly-(B-b-A-b-B) (PBAB) copolymers with controlled molecular weights (M n = 18 700 19 500 g mol -1) and narrow molecular weight distributions (M w/M n = 1.08 -1.17) were successfully synthesized in the presence ofmore » excess NaBPh 4. We prevented the occurrence of the undesirable side reactions during polymerization of B of NaBPh 4, which results in the change in the countercation from K + to Na + for further polymerization of B. Moreover, the cross-linking via the DA reaction between the furan groups of PBAB and bismaleimide was proved by FT-IR and differential scanning calorimetry (DSC), and the thermoreversible properties of the cross-linked polymer were subsequently investigated using DSC and solubility testing.« less