Polyether block amide: Difference between revisions

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{{Short description|Thermoplastic elastomer}}

{{one source|date=July 2020}}

'''Polyether block amide''' or '''PEBA''' is a [[thermoplastic elastomer]] (TPE). It is known under the tradename of PEBAX® ([[Arkema]]) and VESTAMID® E ([[Evonik Industries]]). It is a [[block copolymer]] obtained by [[polycondensation]] of a carboxylic acid [[polyamide]] ([[Nylon 6|PA6]], [[Polyamide 11|PA11]], [[polyamide 12|PA12]]) with an [[Alcohol (chemistry)|alcohol]] termination polyether ([[Polytetramethylene glycol]] PTMG), [[Polyethylene glycol|PEG]]). The general chemical structure is:

:[[Hydrogen|H]][[Oxygen|O]] - ([[Carbon|C]][[Oxygen|O]] - '''[[Polyamide|PA]]''' - [[Carbon|C]][[Oxygen|O]] - [[Oxygen|O]] - '''[[Polyether|PE]]''' - [[Oxygen|O]])_n - [[Hydrogen|H]]

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==Applications==

PEBA is found in the [[sports equipment]] market: for [[Damping ratio|damping]] system components and outsolesmidsoles of high end shoes (running, track & field, football, baseball, basketball, trekking, etc.) where it is appreciated for its low density, damping properties, energy return and flexibility. PEBA is also appreciated by winter sports participants as it enables design of the lightest alpine and Nordic [[ski boot]]s while providing some resistance to extreme environment (low temperatures, [[Ultraviolet|UV]] exposure, moisture). It is used in various other sports applications such as racquet grommets and golf balls.

PEBA is used in medical products such as [[catheter]]s for its flexibility, its good mechanical properties at low and high temperatures, and its softness.

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|-

| Density

| g/cm³³

| 1.00 - 1.03

|-

| Water absorption at equilibrium (23  °C, 50% RH)

| %

| 0.4–0.7

|-

| Water absorption at saturation (23  °C, 24H in water)

| %

| 0.9–1.2

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|-

| Impact resistance (Charpy, notched)

| kJ/m²²

| No break

|-

| Abrasion resistance (10 N/40 m)

| mm³³

| 55–130

| 5

|5-160

| Surface resistivity

| Ω/sq

| 10⁹–10¹³

|-

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[[Category:Copolymers]]

[[Category:Polymers]]

[[Category:Thermoplastic elastomers]]