The effect of lithium chloride on polybenzimidazole and polysulfone blend fibers

Tai‐Shung ‐S Chung*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Polybenzimidazole (PBI) and polysulfone (PS) do not form miscible blends; however, the tensile properties of the polymer blend in fibers, and the fiber process window, are strongly dependent on the presence of LiCl. The addition of LiCl opens the molecular chains and reduces dope viscosity. As a result, LiCl increases the stiffness of PBI/PS fibers while making them brittle. The process window for fabricating useful fibers seems to be narrowed by the presence of LiCl. PBI/PS fibers spun from a dope that does not contain LiCl have a broad process window and their overall fiber performance is superior. LiCl also reduced the degree of sulfonation during the stabilization process.

Original languageEnglish (US)
Pages (from-to)428-433
Number of pages6
JournalPolymer Engineering & Science
Volume34
Issue number5
DOIs
StatePublished - Mar 1994

ASJC Scopus subject areas

  • Chemistry(all)
  • Polymers and Plastics
  • Materials Chemistry

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