Aromatic polymers obtained by precipitation polycondensation: 4. Synthesis of poly(ether ketone ketone)s☆
Abstract 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.
Synthese von aromatischen Polyketonen durch Fällungspolykondensation
Aromatische Polyketone wurden durch Fallungspolykondensation aus den Saurechloriden der Iso- und Terephthalsaure, des 3,3-Bis(4′-carboxy-phenyl)phthalids, des Bis(4-carboxy-phenyl)ethers jeweils mit Diphenylether sowie direkt aus 4-Phenoxybenzoylchlorid hergestellt. Der Einiflus von Katalysator, Losungsmittel und Temperatur auf den Syntheseverlauf wurde untersucht und die Struktur der erhaltenen Polyketone aufgeklart. 
 
 
 
Aromatic Polyketone are synthesized by reaction of the acyl chlorides of iso- and terephtlialic acid, 3,3-bis(4′-carb-oxyphenyl)phthalide, bis(4-carboxy-phenyl)oxide with diphenyloxide and by reaction of 4-phenoxy-benzoylchloride under the conditions of precipitation polycondensation. The influence of catalyst, solvent and temperature on the polymer synthesis is studied. The structures of the resulting polyketones are estimated.
About the Synthesis of a High-temperature, Crystalline Poly[aryl Ether(ketone-co-sulfone)] .1. Synthetic Reactions Study
The synthesis of a new poly[aryl ether(ketone-co-sulfone)] proceeds through a chemical mechanism similar to that in the poly(ether ether ketone) and poly(ether sulfone) polymerizations. It is basically a nucleophilic substitution of a dihalogenated species by two alkaline bisphenates. This paper considers the possibility of the occurrence of some side reactions previously observed during the synthesis of poly(ether ether ketone), poly(ether ketone) or poly(ether sulfone). Unwanted nucleophilic substitutions either by phenates (transetherifications) or by fluoride or hydroxyl anions are considered. Their effectiveness during the copolymer synthesis is demonstrated by different techniques and their influence on the final sequence distribution in the chain is discussed.