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Perfluoroalkoxy alkane
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<table><tbody><tr><th colspan="2">PFA</th></tr><tr><td colspan="2"></td></tr><tr><td><a href="/facts/Density/92p6hh9I">Density</a></td><td>2150 <a href="/facts/Kilogram_per_cubic_metre/a3Qs7uBX">kg/m3</a></td></tr><tr><td><a href="/facts/Flexural_modulus/TmFUTGfR">Flexural modulus</a>(E)</td><td>586 <a href="/facts/Mega-/rk32jTkD">M</a><a href="/facts/Pascal_(unit)/Am1To2Qm">Pa</a></td></tr><tr><td><a href="/facts/Tensile_strength/Cv2jPplR">Tensile strength</a>(t)</td><td>24 <a href="/facts/Mega-/rk32jTkD">M</a><a href="/facts/Pascal_(unit)/Am1To2Qm">Pa</a></td></tr><tr><td>Elongation at break</td><td>300%</td></tr><tr><td>Folding endurance</td><td>No break</td></tr><tr><td>Notch test</td><td></td></tr><tr><td><a href="/facts/Melting_point/MY0w0h0k">Melting point</a></td><td>315 °<a href="/facts/Celsius/okAEu1CA">C</a></td></tr><tr><td>Maximum operating temperature</td><td>260 °<a href="/facts/Celsius/okAEu1CA">C</a></td></tr><tr><td>Water absorption (ASTM)</td><td><0.03 % after 24 hours</td></tr><tr><td><a href="/facts/Dielectric_constant/vnKbPTn1">Dielectric constant</a> (Dk) at 1<a href="/facts/Mega-/rk32jTkD">M</a><a href="/facts/Hertz/6Wshj5qm">Hz</a></td><td>2.1</td></tr><tr><td>Dissipation factor at 1<a href="/facts/Mega-/rk32jTkD">M</a><a href="/facts/Hertz/6Wshj5qm">Hz</a></td><td>0.0001</td></tr><tr><td>Arc resistance</td><td>< 180 seconds</td></tr><tr><td><a href="/facts/Resistivity/akyCKvMy">Resistivity</a> at 50% <a href="/facts/Relative_humidity/Nwb28VlT">R. H.</a></td><td>> 1016 <a href="/facts/Ohm/QNVrlGjw">Ω</a> m</td></tr></tbody></table> <p>Perfluoroalkoxy alkanes (PFA) are <a href="/facts/Fluoropolymer/lMxPIDGc">fluoropolymers</a>. They are <a href="/facts/Copolymer/35D97DuV">copolymers</a> of <a href="/facts/Tetrafluoroethylene/3lzA1S3E">tetrafluoroethylene</a> (C2F4) and <a href="/facts/Perfluoroether/ND0t19t3">perfluoroethers</a> (C2F3ORf, where Rf is a perfluorinated group such as <a href="/facts/Trifluoromethyl/cMG8jjRN">trifluoromethyl</a> (CF3)). The properties of these polymers are similar to those of <a href="/facts/Polytetrafluoroethylene/jesBNXKq">polytetrafluoroethylene</a> (PTFE). Compared to PTFE, PFA has better anti-stick properties and higher chemical resistance, at the expense of lesser scratch resistance. </p>