PEEK material datasheet


 

Ultra-high-molecular-weight polyethylene (UHMWPE, UHMW) is a subset of the thermoplastic polyethylene. Also known as high-modulus polyethylene, (HMPE), or high-performance polyethylene (HPPE), it has extremely long chains, with a molecular mass usually between 3.5 and 7.5 million amu. The longer chain serves to transfer load more effectively to the polymer backbone by strengthening intermolecular interactions. This results in a very tough material, with the highest impact strength of any thermoplastic presently made.

 

Polymerization of UHMWPE was commercialized in the 1950s by Ruhrchemie AG, which has changed names over the years. Today UHMWPE powder materials, which may be directly molded into a product's final shape, are produced by Ticona, Braskem, DSM, Teijin (Endumax), Celanese, and Mitsui. Processed UHMWPE is available commercially either as fibers or in consolidated form, such as sheets or rods.

 

Chemical and physical properties

 

UHMWPE is odorless, tasteless, and nontoxic. It is highly resistant to corrosive chemicals except oxidizing acids; has extremely low moisture absorption and a very low coefficient of friction; is self-lubricating (see boundary lubrication); and is highly resistant to abrasion, in some forms being 15 times more resistant to abrasion than carbon steel. Its coefficient of friction is significantly lower than that of nylon and acetal, and is comparable to that of polytetrafluoroethylene (PTFE, Teflon), but UHMWPE has better abrasion resistance than PTFE.

 

* Citing source: Wikipedia

Chemical resistance chart

 

How to use this chart

 

» Meaning of symbol:

OK: Recommended.

△: Must confirm if usable by testing in advanced.

X: Not recommended.

» This chart only provides the result of a single chemical to material, if a client uses more than one kind of chemical at the same time, please choose material by experience.

» This chart is for reference only which is not applicable to all working environments. Please refer to design equipment according to practical experience.

 

Category

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)

Acetic anhydride

Citric acid

OK (23˚C, 100˚C)

Organic compound

Acetaldehyde

OK (23˚C, 100˚C)

Acetone

OK (23˚C, 100˚C)

Methyl alcohol

 

Aniline

OK (23˚C)

△ (100˚C)

Benzaldehyde

OK (23˚C)

Benzene

OK(23˚C, 100˚C)

Benzyl alcohol

OK (23˚C)

Benzyl chloride

 

Corn oil

 

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)

Paraffin oil

 

Petroleum

 

Phenol

X (Conc.)

Propane, liq

OK (23˚C)

Propanol

OK (23˚C)

Stearic acid

 

Tannic acid

X (10% Conc. @ 23˚C, 100˚C)

Tartaric acid

X (23˚C, 100˚C)

Toluene

OK (23˚C)

Urea

OK (23˚C, 100˚C)

Inorganic compound

Ammonia

OK (23˚C)

Ammonium chloride

 

Ammonium hydroxide

OK (10% Conc. @ 23˚C)

OK (Conc. @ 23˚C)

Ammonium nitrate

Ammonium sulfate

 

Aqua regia

X (23˚C, 100˚C, 200˚C)

Barium chloride

OK (23˚C)

Barium hydroxide

 

Brine

OK (23˚C, 100˚C)

Calcium Chloride

OK (23˚C, 100˚C)

Calcium hydroxide

 

Carbonic acid

OK (23˚C, 100˚C)

Chloric acid

 

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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