Polyaryletherketone PAEK Nomenclature

PAEK are commonly described in terms of an E and a K which refer to the sequence of ether and ketone units in the structure. The most common PAEK are polyaryletheretherketone (PEEK), polyaryletherketone (PEK) and polyaryletherketoneketone (PEKK). PEEKK and PEKEKK are also produced commercially. There are two basic manufacturing routes nucleophilic and electrophilic. Some polymers (e.g., PEKK) are only made commercially hy electrophilic processes whereas others (such as PEEK, PEK and PEKEKK) can be made by either route. 

There are also polyketone copolymers in which the structure cannot be represented by a single repeating unit. (In the field of PAEK, 

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