Fumapem AM-40 - PBI Copolymer

Please note that this material has been discontinued and we are completely out of stock. Fumapem AM-40 is a non-reinforced Polybenzimidazole Copolymer membrane designed for use in High-Temperature Proton Electrolyte Fuel Cells (HT-PEMFC). The polymer backbone for this HT-PEMFC membrane is categorized as a hydrocarbon polymer material. Fumapem AM-40 membrane comes in either a 10cm x 10cm or 20cm x 30cm size sheet. The membrane is the brown foil delivered in dry form. Fumatech membranes are highly sensitive to differences in humidity and moisture content. Therefore the membranes can vary +/- 0.5cm from the original cut sizes. Also due to this sensitivity the manufacturer expects wrinkles to form, however soaking the membranes in deionized water will return the membranes to the full size planar state according to the manufacturer. Fumapem AM-40 Features: • Applications: High-Temperature PEM Fuel Cell (HT-PEMFC). • Thickness: 40 micrometers (1.57 mil) • Sizes: 10cm x 10cm, 20cm x 30cm Fumapem AM-40 Technical Specification Sheet Handling: Keep membrane package closed / sealed when unused. Store, handle and process the membrane in a clean and dust-free area. Use only new and sharp knives or blades, when cutting the membrane. Always wear protective gloves when handling the membrane. Handle with care, be sure not to puncture, crease or scratch the membrane, otherwise leaks will occur. All surfaces in contact with the membrane during handling, inspection, storage and mounting must be smooth and free of sharp projections. Doping with Phosphoric Acid Recommendation: Put the membrane sample in 85 wt % H3PO4 at temperatures between 90°C and 160°C for at least 1 hour. Membranes must be covered by phosphoric acid. Membranes will expand when subject to doping process. If you have any concerns about storage, chemical stability, pre-treatment or before proceeding, please feel free to contact us for further information. Long Term Storage: The membrane can be stored dry for an unlimited amount of time. However, the membrane has to be conditioned (washed and rinsed) prior to use.

Membrane Properties

Membrane	Cation Exchange Membrane
Thickness	114 - 124 µm (microns)
Appearance / Color	Transparent / Colorless
Backing Foil	PET Foil
Delivery Form	Dry
Reinforcement	None
Counter Ion	H-form
Density	2.4 mg•cm-2
Selectivity	93 - 94 %
Proton Transfer Rate	6910 µmol•min-1•cm-2
Ion Exchange Capacity	0.88 - 0.91 meq•g-1
Dimensional Swelling in H2O at 25°C	13 - 14 %
Uptake in H2O at 25°C	24 wt %
Non-Std Modulus (MPa)	205 - 218 MPa
Tensile Strength - max. (MPa)	27 - 31 MPa
Yield Strength at 23°C / 50 % R.H.	9 MPa
Elongation to Break (%)	235 - 277 %
Bubble Point Test in Water at 25°C	> 3 bar