PREPARATION AND CHARACTERIZATION OF FLUORINE-CONTAINING AROMATIC CONDENSATION POLYMERS .5. AROMATIC POLYBENZIMIDAZOLES FROM 4,4'-(HEXAFLUOROISOPROPYLIDENE)DIBENZOIC ACID AND AROMATIC TETRAMINE TETRAHYDROCHLORIDES
Y. Saegusa et al., PREPARATION AND CHARACTERIZATION OF FLUORINE-CONTAINING AROMATIC CONDENSATION POLYMERS .5. AROMATIC POLYBENZIMIDAZOLES FROM 4,4'-(HEXAFLUOROISOPROPYLIDENE)DIBENZOIC ACID AND AROMATIC TETRAMINE TETRAHYDROCHLORIDES, Macromolecular chemistry and physics, 198(2), 1997, pp. 619-625
Two novel fluorine-containing aromatic polybenzimidazoles were synthes
ized by direct polycondensation of 4,4'-(hexafluoroisopropylidene)dibe
nzoic acid with 3,3'-diaminobenzidine tetrahydrochloride and 1,2,4,5-b
enzenetetramine tetrahydrochloride. The effect of introduction of fluo
rine on the synthesis and properties of these polymers is discussed. T
he new polybenzimidazoles show good solubility in organic solvents, ex
cellent mechanical properties and high thermal stability.