Polyether ether ketone (PEEK) is a colourless organic thermoplastic polymer in the polyaryletherketone (PAEK) family, used in engineering applications.
Chemical and physical properties
PEEK is a semicrystalline thermoplastic with excellent mechanical and chemical resistance properties that are retained to high temperatures. The processing conditions used to mold PEEK can influence the crystallinity, and hence the mechanical properties. The Young's modulus is 3.6 GPa and its tensile strength 90 to 100 MPa. PEEK has a glass transition temperature of around 143 °C (289 °F) and melts around 343 °C (662 °F). Some grades have a useful operating temperature of up to 250 °C (482 °F) . The thermal conductivity increases nearly linearly versus temperature between room temperature and solidus temperature.[5] It is highly resistant to thermal degradation as well as attack by both organic and aqueous environments. It is attacked by halogens and strong Bronsted and Lewis acids as well as some halogenated compounds and aliphatic hydrocarbons at high temperatures. It is soluble in concentrated sulfuric acid at room temperature, although dissolution can take a very long time unless the polymer is in a high surface area to volume form such as a fine powder or thin film. It has high resistance to biodegradation.
* Citing source: Wikipedia
Chemical resistance chart
How to use this chart
» Meaning of symbol:
OK: Recommend
△: Must confirm if usable by testing advanced.
X: Not recommend
» This chart only provide result of single chemical to material, if client use more than one kinds of chemical in the same time, please choose material by experience.
» This chart is for reference which not able to be applicable to all environment. Please design equipment according to practical experience.
| Catagory |
Chemical |
PEEK |
| Organic acids |
Acetic acid |
OK (10% @ 23°C,100°C) OK (Conc. @ 23°C,100°C)
|
| Acetic acid, glacial |
OK (23°C,100°C) |
| Citric acid |
OK (23°C,100°C)
|
| Organic compound |
Acetaldehyde
|
OK (23°C,100°C)
|
Acetone
|
OK (23°C,100°C)
|
| Aniline |
OK (23°C) △ (100°C)
|
| Benzaldehyde |
OK (23°C)
|
| Benzene |
OK (23°C,100°C)
|
Benzyl alcohol
|
OK (23°C) |
| Ethanol |
OK (23°C,100°C)
|
Ethylene glycol
|
OK (23°C,100°C)
|
| Fatty acid |
OK (23°C,100°C) |
| Formaldehyde |
OK (23°C,100°C) |
Formic acid
|
△ (23°C,100°C)
|
| Hexane |
OK (23°C)
|
| Lactic acid |
OK (23°C,100°C) |
Methanol
|
OK (23°C,100°C)
|
| Phenol |
X (Conc.)
|
| Propane,liq |
OK (23°C)
|
| Propanol |
OK (23°C)
|
| Tannic acid |
X (10% Conc. @ 23°C, 100°C) |
| Tartaric acid |
OK (23°C,100°C)
|
| Toluene |
OK (23°C) |
| Urea |
OK (23°C,100°C) |
| Inorganic compound |
Ammonia
|
OK (23°C)
|
| Ammonium hydroxide |
OK (10% Conc. @ 23°C) OK (Conc. @ 23°C) |
Aqua regia
|
X (23°C, 100°C, 200°C)
|
| Barium chloride |
OK (23°C)
|
Brine
|
OK (23°C,100°C)
|
Calcium Chloride
|
OK (23°C,100°C)
|
Carbonic acid
|
OK (23°C,100°C)
|
Chlorine
|
X (23°C, 100°C, 200°C) |
| Detergent |
OK (non-phenolic @ 23°C,100°C)
|
| Hydrobromic acid |
OK(20%)
X (100% @ 23°C, 100°C, 200°C)
|
| Hydrochloric acid
|
OK (10% Conc. @ 23°C,100°C) OK (Conc. @ 23°C)
△ (Conc. @ 100°C)
|
Hydrofluoric acid
|
X (40% Conc. @ 23°C, 100°C, 200°C)
|
Hydrogen peroxide
|
OK (23°C,100°C)
|
Nitric acid
|
OK (10% Conc. @ 23°C,100°C) △(30% Conc. @ 23°C)
X (50% Conc. @ 23°C,100°C, 200°C) X (Conc. @ 23°C,100°C, 200°C)
|
Phosphoric acid
|
OK (10% Conc. @ 23°C,100°C, 200°C)
OK (50% Conc. @ 23°C,100°C, 200°C)
OK (80% Conc. @ 23°C,100°C)
|
Potassium hydroxide
|
OK (10% Conc. @ 23°C) OK (70% Conc. @ 23°C)
|
Potassium nitrate
|
OK (23°C,100°C)
|
Potassium sulfate
|
OK (23°C,100°C)
|
Sodium carbonate
|
OK (23°C,100°C)
|
Sodium hydroxide
|
OK (10% Conc. @ 23°C,100°C, 200°C)
OK (50% Conc. @ 23°C,100°C, 200°C) OK (Conc. @ 23°C)
|
| Sodium nitrate |
OK (23°C,100°C) |
| Sulfuric acid |
△ (<40% Conc. @ 23°C,100°C, 200°C)
X (>40% Conc. @ 23°C,100°C, 200°C)
|
| Sulfur dioxide |
OK (23°C @ 100°C, 200°C)
|
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