Partially fluorinated proton exchange membranes based on PVDF–SEBS blends compatibilized with methylmethacrylate block copolymers

Download
  1. (PDF, 867 KB)
  2. Get@NRC: Partially fluorinated proton exchange membranes based on PVDF–SEBS blends compatibilized with methylmethacrylate block copolymers (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1016/j.memsci.2006.06.032
AuthorSearch for: ; Search for: ; Search for:
TypeArticle
Journal titleJournal of Membrane Science
Volume283
Issue1-2
Pages7483; # of pages: 10
SubjectProton exchange membrane; Melt extrusion; PVDF; SEBS; SBM block copolymer; Compatibilization
AbstractThis paper reports on a new route to prepare functional polymer blends for fuel cell’s proton exchange membrane applications. Polyvinylidene fluoride (PVDF) and styrene-ethylene/butylene-styrene (SEBS) thermoplastic elastomer were melt blended and extruded into films. Interface modification using poly(methylmethacrylate-butylacrylate-methylmethacrylate) block copolymer (MAM), and two grades of poly(styrene-butadienemethylmethacrylate) block copolymer was used to optimize the blends performance. The films made out of these blends were grafted with sulfonic acid moieties to obtain ionic conductivity leading to semi-fluorinated proton exchange membranes. The effect of varying the nature and concentration of the compatibilizer on the morphology and properties of a 50/50 wt.% PVDF/SEBS blends was investigated. SEM analysis showed that the addition of the block copolymers to the blends affected the morphology significantly and in the best case, that as low as 1 wt.% block copolymer was sufficient to dramatically reduces the segregation scale and improves mechanical properties. The samples were characterized in terms of morphology, microstructure and thermo-mechanical properties and in terms of conductivity, ion exchange capacity (IEC) and water uptake to establish the blends morphology–property relationships. Compatibilized blend membranes showed conductivities up to 3×10⁻² S cm⁻¹ at 100% relative humidity, and an IEC = 1.69 meq g⁻¹. Water swelling decreased for compatibilized blend membranes.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute
Peer reviewedYes
NRC number48963
NPARC number15884127
Export citationExport as RIS
Report a correctionReport a correction
Record identifierfecf58f4-9a79-4158-8b56-628df6153789
Record created2010-07-30
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)