Synthesis of poly(arylene ether ether ketone ketone) copolymers containing pendant sulfonic acid groups bonded to naphthalene as proton exchange membrane materials

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DOIResolve DOI: http://doi.org/10.1021/ma04997lf
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TypeArticle
Journal titleMacromolecules
Volume37
Issue18
Pages67486754; # of pages: 7
AbstractA new series of wholly aromatic poly(ether ether ketone ketone) containing pendant sulfonic acid groups (SPAEEKK) were conveniently prepared by potassium carbonate mediated nucleophilic polycondensation reactions of inexpensive commercially available monomers 1,3-bis(4-fluorobenzoyl)- benzene (BFBB), sodium 6,7-dihydroxy-2-naphthalenesulfonate (DHNS), and 4,4¢-biphenol or hydroquinone in N-methyl-2-pyrrolidone (NMP) at 170 °C. FT-IR and NMR were used to characterize the structures and the sulfonate or sulfonic acid contents (SC) of the polymers. Flexible membrane films were obtained by casting N,N-dimethylacetamide (DMAc) solutions of copolymers. Membrane films in acid form were then obtained by treating the sodium form membrane films in 2 N sulfuric acid at room temperature. Glass-transition temperatures (Tg’s) and decomposition temperatures (Td’s) of SPAEEKKs in both sodium and acid forms were determined. Water uptake and swelling ratio values increased with SCs and temperatures. The proton conductivities of acid form membrane films increased with SC value and temperature and reached 5.6 x 10-2 S/cm at 100 °C for SPAEEKK-100.
Publication date
LanguageEnglish
AffiliationNRC Institute for Chemical Process and Environmental Technology (ICPET-ITPCE); National Research Council Canada
Peer reviewedYes
NRC number46469
NPARC number8910211
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Record identifier3016cf33-1032-49a5-afbc-f3c980af9c14
Record created2009-04-22
Record modified2016-05-09
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