| Download | - View accepted manuscript: Partially fluorinated proton exchange membranes based on PVDF–SEBS blends compatibilized with methylmethacrylate block copolymers (PDF, 1.1 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1016/j.memsci.2006.06.032 |
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| Author | Search for: Mokrini, A.1; Search for: Huneault, M. A.1; Search for: Gerard, P. |
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| Affiliation | - National Research Council of Canada. NRC Industrial Materials Institute
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| Format | Text, Article |
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| Subject | Proton exchange membrane; Melt extrusion; PVDF; SEBS; SBM block copolymer; Compatibilization |
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| Abstract | This 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. |
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| Publication date | 2006-06-23 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC number | NRCC 48963 |
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| NPARC number | 15884127 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | fecf58f4-9a79-4158-8b56-628df6153789 |
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| Record created | 2010-07-30 |
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| Record modified | 2020-04-22 |
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