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Polyether block amide
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<p>Polyether block amide or PEBA is a <a href="/facts/Thermoplastic_elastomer/bBGfjapB">thermoplastic elastomer</a> (TPE). It is known under the tradename of PEBAX® (<a href="/facts/Arkema/3Kr4g6xY">Arkema</a>) and VESTAMID® E (<a href="/facts/Evonik_Industries/P2LDQ8I7">Evonik Industries</a>). It is a <a href="/facts/Block_copolymer/35D97DuV">block copolymer</a> obtained by <a href="/facts/Polycondensation/lJHUMx53">polycondensation</a> of a carboxylic acid <a href="/facts/Polyamide/8AmQgTFa">polyamide</a> (<a href="/facts/Nylon_6/8Dtq3N7z">PA6</a>, <a href="/facts/Polyamide_11/8Vn0oCmx">PA11</a>, <a href="/facts/Polyamide_12/lYKcUNYp">PA12</a>) with an <a href="/facts/Alcohol_(chemistry)/Y0SCTDkh">alcohol</a> termination polyether (Polytetramethylene glycol PTMG), <a href="/facts/Polyethylene_glycol/tC7xBFwr">PEG</a>). The general chemical structure is: </p> <a href="/facts/Hydrogen/BoYHjl0J">H</a><a href="/facts/Oxygen/acyn6o8r">O</a> - (<a href="/facts/Carbon/ukrgQexo">C</a><a href="/facts/Oxygen/acyn6o8r">O</a> - <a href="/facts/Polyamide/8AmQgTFa">PA</a> - <a href="/facts/Carbon/ukrgQexo">C</a><a href="/facts/Oxygen/acyn6o8r">O</a> - <a href="/facts/Oxygen/acyn6o8r">O</a> - <a href="/facts/Polyether/jwDg0IKr">PE</a> - <a href="/facts/Oxygen/acyn6o8r">O</a>)n - <a href="/facts/Hydrogen/BoYHjl0J">H</a> <p>PEBA is a high performance thermoplastic elastomer. It is used to replace common elastomers – thermoplastic polyurethanes, polyester elastomers, and silicones - for these characteristics: lower density among TPE, superior mechanical and dynamic properties (flexibility, <a href="/facts/Brittleness/cn27H2vg">impact resistance</a>, <a href="/facts/Elasticity_(physics)/wcJoIFg1">energy return</a>, <a href="/facts/Fatigue_(material)/zmJY8hMt">fatigue resistance</a>) and keeping these properties at low temperature (lower than -40 °<a href="/facts/Celsius/okAEu1CA">C</a>), and good resistance against a wide range of chemicals. It is sensitive to <a href="/facts/UV_degradation/JD3bkFtL">UV degradation</a>, however. </p>