Polybenzimidazole and polysulfone blends

Tai‐Shung ‐S Chung*, Morton Glick, Edward J. Powers

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Polybenzimidazole (PBI) and polysulfone (PS) do not form miscible blends; however, the tensile modulus and strength of their blend fibers are comparable to, or better than, that of PBI fibers, depending on process conditions. Fibers spun from an 80/20 PBI/PS solution blend have PBI‐like LOI (limiting oxygen indices) and flame shrinkage behavior. Sulfonation and stabilization of this fiber improve its thermal properties. The process window for these blend fibers has been determined. There was no aging phenomenon on as‐spun PBI/PS blend fibers, while as‐spun fibers made from PBI/polyarylate (PA) and PBI/high modulus aramides (HMA) exhibited remarkable aging effects on fiber properties. This difference probably arises from the fact that (1) the former is not a miscible blend, while the latter are; and (2) the former does not have hydrolysis groups, such as ester and amide groups, as that in the PA and HMA systems.

Original languageEnglish (US)
Pages (from-to)1042-1048
Number of pages7
JournalPolymer Engineering & Science
Issue number16
StatePublished - Aug 1993
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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