Hydrogen bonding in polybenzimidazole/polyimide systems: a Fourier-transform infra-red investigation using low-molecular-weight monofunctional probes

摘要: Abstract To elucidate the nature of specific interactions occurring in polybenzimidazole/polyimide (PBI/PI) miscible blends, a Fourier-transform infra-red investigation on these polymers presence low-molecular-weight monofunctional compounds was undertaken. In case PBI probe were proton-accepting molecules (aliphatic ketones) able to form hydrogen-bonding with polymeric substrate. two investigated polyimides, poly([2,2′-bis(3,4-dicarboxyphenoxy)phenylpropane]-2-phenylenebisimide) (Ultem 1000) and condensation product 3,3′,4,4′-benzophenone tetracarboxylic dianhydride 5(6)-amino-1-(4′-aminophenyl)-1,3,3′-trimethylindane (XU 218), carbonyl functional group probes replaced by hydroxyl group. This approach allowed us conclude that PBI/PI blend systems interaction occurs between components.