A method for the manufacture of polyether ketone ketone (PEKK), including: (i) providing a 1,4-bis(4-phenoxybenzoyl)benzene-Lewis acid complex; (ii) purifying said 1,4-bis(4-phenoxybenzoyl)benzene-Lewis acid complex; (iii) reacting said 1,4-bis(4-phenoxybenzoyl)benzene-Lewis acid complex with at least one difunctional aromatic acyl chloride in a reaction solvent and optional additional Lewis acid to obtain a product mixture including a PEKK-Lewis acid complex; and (iv) decomplexing the PEKK-Lewis acid complex to obtain a PEKK polymer.

Further, a composition including at least 40 wt. % of 1,4-bis(4-phenoxybenzoyl)benzene-Lewis acid complex and an anhydrous aprotic solvent or solvent mixture, characterized in that it includes less than 1 wt. %, preferably less than 0.5 wt. % and in particular less than 0.1 wt. % of molecules including xanthydrol groups and its use for the manufacture of polyether ketone ketone.

Provided are compositions including a core moiety and a plurality of polymeric units, in which at least one of these can include an ionizable moiety or an ionic moiety. The core moiety may be a multivalent core moiety, trivalent core moiety, tetravalent core moiety, pentavalent core moiety, or multivalent arylene moiety. Materials, electrochemical cells, and methods using such compositions are also described.

A method for manufacturing 1,4-bis(4-phenoxybenzoylbenzene), including: providing a reactant mixture including terephthaloyl chloride and diphenyl ether in a solvent; adding a Lewis acid to the reactant mixture, so as to obtain a product mixture; wherein the temperature of the reactant mixture is greater than 5 C. during at least part of the step of adding the Lewis acid to the reactant mixture.

A method for manufacturing 1,4-bis(4-phenoxybenzoylbenzene), including: providing terephthaloyl chloride, diphenyl ether, a solvent and a Lewis acid, wherein the terephthaloyl chloride is of a purity grade such that, 10 minutes after introducing it at a reference concentration of 6.5 wt. % into said solvent, at a temperature of 20 C., a solution is obtained having a turbidity of less than 500 NTU; mixing the terephthaloyl chloride, the diphenyl ether and the solvent so as to make a reactant mixture; adding the Lewis acid to the reactant mixture so as to effect the reaction of the terephthaloyl chloride with the diphenyl ether; recovering a product mixture comprising a 1,4-bis(4-phenoxybenzoylbenzene)-Lewis acid complex.

A method for manufacturing 1,4-bis(4-phenoxybenzoylbenzene), including: reacting terephthaloyl chloride with diphenyl ether in a reaction solvent and in the presence of a Lewis acid, so as to obtain a product mixture including a 1,4-bis(4-phenoxybenzoylbenzene)-Lewis acid complex; contacting the product mixture with an aqueous solution, so as to obtain an aqueous phase containing the Lewis acid and an organic phase containing 1,4-bis(4-phenoxybenzoylbenzene).

Aspects of the present disclosure generally describe polyarylether ketones and methods of use. In some aspects, a composition includes one or more polymers of formulae (I), (II), or (III):

##STR00001## ##STR00002##

Aspects of the present disclosure generally describe polyarylether ketones and methods of use. In some aspects, a composition includes one or more polymers of formula (IV):

##STR00001##

The present invention provides a method of preparing an amine-functionalized (e.g. amine-terminated) polyaryletherketone polymer, or imide- or sulphone-copolymer thereof and amine-protected analogs thereof, said method comprising the step of polymerizing a monomer system in a reaction medium comprising a capping agent comprising NR.sub.2, NRH or a protected amine group.

Disclosed herein in various embodiments are aryl-ether free polyaromatic polymers based on random copolymer architecture with two, three, or more aromatic ring components and methods of preparing those polymers. The polymers of the present disclosure can be used as ion exchange membranes, e.g., as anion exchange membranes, and ionomer binders in alkaline electrochemical devices.

Provided is a polymer having exceptional solubility in hydrophilic polar solvents and stability in solvents. The present invention provides a polymer containing one or two structural units selected from the group consisting of structural units represented by chemical formula (1) and chemical formula (2) (in formula (1) and formula (2), X1 and X2 may be the same or different, and represent H, an optionally substituted C1-12 alkyl group, an optionally substituted C1-12 alkoxy group, an optionally substituted C1-12 alkylene oxide group, an optionally substituted thiocyano group, an optionally substituted amino group, or an optionally substituted thioalkyl group, or an optionally substituted C1-12 alkylene dioxy group or optionally substituted C1-12 alkylene dithio group in which X1 and X2 are linked (excluding combinations in which both X1 and X2 are H or C1-12 alkyl groups and combinations in which one of X1 and X2 is H and the other is a C1-12 alkyl group); R represents a C1-12 alkyl group having an acidic substituent or a salt thereof, a C1-12 alkoxy group, a C1-12 alkylene oxide group having 1-50 repeating units, a phenyl group, a heterocyclic group, or a fused ring group).