High molecular weight aromatic poly(ether ketone ketone)s were synthesized by the Friedel-Crafts polyacylation condensation of iso-and terephthaloyl chlorides with diphenyl ether, 1,4-and 1,3-bis(4-phenoxybenzoyl)benzenes. Depending on the monomers used for polycondensation, polyketones of regular structure with different iso-/tereisomer repeating unit ratio (100/0, 50/50, 0/100) in the main chain were obtained. Polymers of each repeating isomer unit were prepared in two different ways. All the polymer syntheses were performed as precipitation polycondensations and the resulting polymers were obtained in particle form. The influence of reaction conditions and preparation route on the polymer properties were examined. The monomer concentration and monomer stoichiometric ratio were found to affect the polymer viscosity. The size and shape of the polyketone particles obtained were also found to be governed by reaction conditions and preparation route.

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A high molecular weight, linear aromatic poly(ether ketone ether ketone ketone) (PEKEKK) has been synthesized by electrophilic Friedel-Crafts acylation condensation of 1,4-diphenoxybenzophenone with terephthaloyl chloride. The syntheses were performed as precipitation polycondensations, and the polyketones were obtained in particle form. The viscosity (molecular weight), shape and size of these particles were found to be strongly dependent on the reaction conditions. For low monomer concentration, highly ordered needle-like particles were also obtained. The chemical structure of the polymers obtained was confirmed by 'H and 13C NMR spectroscopy, and para-substitution in aryl fragments of the main chain was identified. Analysis of the expanded 'H NMR spectra for the ring proton resonances reveals defect mefa-and ortho-structures. The amount and isomer ratio of these defect structures depend on the monomer concentration used. a) part 1: cf. ref.'). b, Structure-based name: Poly(oxy-1,4-phenylenecarbonyl-1,4-phenyleneoxy-1 ,4-phenylenecarbonyl-1,4-phenylenecarbonyl-1,4-phenylene).

Aromatische Polyketone wurden durch Fällungspolykondensation aus den Säurechloriden der Iso‐ und Terephthalsäure, des 3,3‐Bis(4′‐carboxy‐phenyl)phthalids, des Bis(4‐carboxy‐phenyl)ethers jeweils mit Diphenylether sowie direkt aus 4‐Phenoxybenzoylchlorid hergestellt. Der Einifluß von Katalysator, Lösungsmittel und Temperatur auf den Syntheseverlauf wurde untersucht und die Struktur der erhaltenen Polyketone aufgeklärt.