Aramid and imidazole based polyelectrolytes: physical properties and ternary phase behavior with poly(benzobisthiazole) in methanesulfonic acid

Abstract

Poly(p-phenyleneterephthalamido-N-propanesulfonate) (PPTA-PS), poly(p-phenyleneterephthalamido-N-methylbenzenesulfonate) (PPTA-BzS), poly[2,2'-m-phenylene-5,5'-bibenzimidazolyl-N-propanesulfonate] (PBI-PS), and poly[2,2'-m-phenylene-5,5'-bibenzimidazolyl-N-methylbenzenesulfonate] (PBI-BzS) have been synthesized via a general derivatization procedure for attachment of alkanesulfonate or arenesulfonate side chains onto polymers containing reactive N-H sites. All of the polyelectrolytes are soluble in polar aprotic solvents and in some instances are water soluble at high levels of derivatization