Polyether ether ketone: Difference between revisions

Revision as of 10:05, 23 June 2006

Revision as of 10:09, 23 June 2006

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=== Chemical Resistance ===

PEEK also exhibits good chemical resistance in many environments, including alkalis (i.e. sodium, potassium and ammonium hydroxides) , aromatic hydrocarbons, alcohols (i.e. ethanol, propanol), greases, oils and halegonated hydrocarbons.

However, it's performance in acids is very dependent on the type of acid - PEEK shows poor resistance in oleum and concentrated sulphiric, nitric, hydrochloric, hydrobromic and other mineral acids. It's resistance to hydrofluoric acid is very poor. PEEK shows good resistance to phosphoric acid and organic acids (acetic, citric, oxalic, tataric etc.), but varying resistance in the presence of halogens. PEEK is resistant to dissolution by some formaldehydes and ketones such as acetone, but not (at higher temperature) methylethyl ketone.