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Showing 1 to 4 of 4 for “"Polytetrafluorethylene"”.
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Mechanics of proton exchange membranes : time, temperature, and hydration dependence of the stress-strain behavior of persulfonated polytetrafluorethylene
Fuel cells are an important part of the future strategy for reducing dependence on fossil fuels as the world's supplies become more limited and greenhouse gasses become more of a concern. Proton Exchange Membrane Fuel Cells (PEMFC), in which protons from hydrogen gas are passed across a membrane to …
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The Electrical Properties And Microstructure Of An Ion Beam Mixed Metal-Polymer System
… the metal and polymer at the interface. The polytetrafluorethylene samples (PTFE) mixed with Cr metal layers. The optical properties indicate surface and near-surface structure. SEM pictures show a smooth surface after implantation and cracks in the metal layer. The thermal damage results in …
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Porous titanium felts as alternative metal gas diffusion layers for low temperature PEM fuel cells
… of a hydrophobic treatment of 5 – 20 wt% polytetrafluorethylene (PTFE) to the best performing felt, and iii) application of a microporous layer (MPL) to the best performing felt. Within each work package, the GDL configurations are evaluated in terms of performance, mass transport …
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Analyse der viskoelastischen Eigenschaften von Poly(tetrafluorethylen) im Bereich des Beta-Übergangs
The ß-relaxation of poly(tetrafluoroethylene) (PTFE) takes place at room temperature. Therefore, an in-depth understanding of the viscoelastic performance is of fundamental importance and of particular interest for technical applications. The ß-relaxation is admittedly complicated by two first …