A zwitterionic monomer and corresponding cyclopolymerized polyzwitterion () (PZ) (i.e. poly(Z-alt-SO.sub.2). Phosophonate ester hydroloysis in PZ gave a pH-responsive polyzwitterionic acid () (PZA). The PZA under pH-induced transformation was converted into polyzwitterion/anion () (PZAN) and polyzwitterion/dianion (=) (PZDAN).

A process for the manufacture of a polyarylethersulfone PAES (P2) using recycled polymeric material, comprising heating a reaction medium (RM) comprising a recycled polymeric material containing a polyarylethersulfone PAES (P1), at least one monomer (M), an alkali salt-forming agent (A) and a polar aprotic solvent (S) to reach a reaction temperature of at least 150 C. to form a PAES (P2); and separating the forned PAES (P2) from the reaction medium. The PAES (P1) recycle ratio may be from 100 wt. % to 1 wt. %. The recycled polymeric material added to the reaction medium may further include other polymer(s), solid fillers, and/or additives. The monomer (M) may be at least one aromatic diol monomer (AA) and/or at least one aromatic dihalo monomer (BB). The diol (AA) may comprise bisphenol A, bisphenol S, biphenol, a 1,4:3,6-dianhydrohexitol sugar diol and/or tetramethyl bisphenol F, and the dihalo (BB) may comprise non-sulfonated and/or disulfonated dihalodiphenylsulfone.

A process for the manufacture of a polyarylethersulfone PAES (P2) using recycled polymeric material, comprising heating a reaction medium (RM) comprising a recycled polymeric material containing a polyarylethersulfone PAES (P1), at least one monomer (M), an alkali salt-forming agent (A) and a polar aprotic solvent (S) to reach a reaction temperature of at least 150 C. to form a PAES (P2); and separating the forned PAES (P2) from the reaction medium. The PAES (P1) recycle ratio may be from 100 wt. % to 1 wt. %. The recycled polymeric material added to the reaction medium may further include other polymer(s), solid fillers, and/or additives. The monomer (M) may be at least one aromatic diol monomer (AA) and/or at least one aromatic dihalo monomer (BB). The diol (AA) may comprise bisphenol A, bisphenol S, biphenol, a 1,4:3,6-dianhydrohexitol sugar diol and/or tetramethyl bisphenol F, and the dihalo (BB) may comprise non-sulfonated and/or disulfonated dihalodiphenylsulfone.