Poly(naphthoylenebenzimidazole)s with trifluoromethyl and phenyl substituents

Abstract

129 Poly(naphthoylenebenzimidazole)s (PNBIs) is one of the most important classes of thermostable polymers with a combination of unique properties: thermal stability; heat, fire, and chemical resistance; high hydrolytic and radiation stability; etc. [1–3]. However, the application of these polymers is limited by their insolubility in organic solvents and, hence, poor processability. Therefore, attempts have been made in recent years to introduce flexible fragments or bulky substituents into polymeric chains to impart sol ubility to PNBIs [4, 5].