Untreated Nafion™ 115 is 127 micrometers (5 mil) thick.
Chemours' Nafion™ 115 membranes are non-reinforced films based on chemically stabilized perfluorosulfonic acid/PTFE copolymer in the acid (H+) form. The physical properties remain the same for the chemically stabilized membranes, which exhibit substantially lower fluoride ion release compared to the non-stabilized polymer – a sign of improved chemical durability. Nafion™ PFSA membranes are widely used for Proton Exchange Membrane (PEM) fuel cells and water electrolyzers. The membrane performs as a separator and solid electrolyte in a variety of electrochemical cells that require the membrane to selectively transport cations across the cell junction. The polymer is chemically resistant and durable.
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|Thickness||127 micrometers (5 mil)|
|Basic Weight (g/m²)||250|
|Tensile Strength - max. (MPa)||43 (6.2) in MD, 32 (4.6) in TD - Method: ASTM D 882|
|Non-Std Modulus (MPa)||249 (36) - Method: ASTM D 882|
|Elongation to Break (%)||225 (MD), 310 (TD) - Method: ASTM D 882|
|Tear Resistance - Initial (g/mm)||6000 (MD, TD) - Method: ASTM D 1004|
|Tear Resistance - Propagating (g/mm)||>100 (MD), >150 (TD) - Method: ASTM D 1922|
|Specific Gravity (23 °C, 50% RH)||1.98|
|Available Acid Capacity (meq/g)||0.90 min|
|Total Acid Capacity (meq/g)||0.95 to 1.01|
|Conductivity (S/cm)||0.10 min|
|Water content (% water)||5.0 - Method: ASTM D 570|
|Water uptake (% water)||38.0 - Method: ASTM D 570|
|Linear Expansion % increase - 50% RH, 23°C to water soaked 23°C||10.0 - Method: ASTM D 756|
|Linear Expansion % increase - 50% RH, 23°C to water soaked 100°C||15.0 - Method: ASTM D 756|