Miscible blends of nitro-substituted polybenzimidazole and polyetherimide

Junhan Cho, Min Su Park, Jin Hyun Choi, Byung Chul Ji, Sung Soo Han, Won Seok Lyoo

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

A novel blend system was prepared by blending organosoluble nitro-substituted polyblenzimidazole (NO2-PBI) and polyetherimide (PEI) in a cosolvent at a moderate condition. It was shown that the NO2-PBI/PEI blends not only possess tractable processability owing to the enhanced solubility of NO2-PBI but also retain the desirable features of unmodified PBI/PEI blends. Apparent miscibility in the blends was observed and attributed to hydrogen-bonding interactions between N-H groups in NO2-PBI and carbonyl groups in PEI. It was revealed that the NO2-PBI/PEI blends phase-separate upon heating above the glass-transition temperatures. The observed mixing of NO2-PBI and PEI in a molecular level, although sustainable only in the glassy region, was shown to lend synergy effects to the physical properties of the blends.

Original languageEnglish
Pages (from-to)1778-1783
Number of pages6
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume39
Issue number15
DOIs
StatePublished - 1 Aug 2001

Keywords

  • Blends
  • Hydrogen bonding
  • Miscibility
  • Nitro-substituted polybenzimidazole (PBI)
  • Phase separation
  • Polyetherimide (PEI)

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