Synthesis and characterization of sulfonated poly(phthalazinone ether ketone) for proton exchange membrane materials

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DOIResolve DOI: http://doi.org/10.1002/pola.10601
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TypeArticle
Journal titleJounral of Polymer Sciende: Part A: Polymer Chemistry
Volume41
Issue4
Pages497507; # of pages: 11
SubjectPoly(phthalazinone ether ketone); Sulfonation; Proton exchange membranes; Fuel cell; Poly(ether ketones); Ionomers; Membranes
AbstractAs a novel class of proton exchange membrane materials for use in fuel cells, sulfonated poly(phthalazinone ether ketone)s (SPPEKs) were prepared by the modification of poly(phthalazinone ether ketone). Sulfonation reactions were conducted at room temperature with mixtures of 95舑98% concentrated sulfuric acid and 27舑33% fuming sulfuric acid with different acid ratios, and SPPEK was obtained with a degree of sulfonation (DS) in the desired range of 0.6 舑1.2. The presence of sulfonic acid groups in SPPEK was confirmed by Fourier transform infrared analysis, and the DS and structures were characterized by NMR. The introduction of sulfonic groups into the polymer chains increased the glass-transition temperature above the decomposition temperature and also led to an overall decrease in the decomposition temperature. Membrane films were cast from SPPEK solutions in N,N-dimethylacetamide. Water uptakes and swelling ratios of SPPEK membrane films increased with DS, and SPPEKs with DS > 1.23 were water-soluble at 80 °C. Proton conductivity increased with DS and temperature up to 95 °C, reaching 10-2S/cm.
Publication date
LanguageEnglish
AffiliationNRC Institute for Chemical Process and Environmental Technology (ICPET-ITPCE); National Research Council Canada
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public
Peer reviewedYes
NRC number44391
NPARC number12338171
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Record identifier10fb21e4-37fd-4176-b902-dea65c798e39
Record created2009-09-10
Record modified2016-05-09
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