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 language | English |
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Pages (from-to) | 1778-1783 |
Number of pages | 6 |
Journal | Journal of Polymer Science, Part B: Polymer Physics |
Volume | 39 |
Issue number | 15 |
DOIs | |
State | Published - 1 Aug 2001 |
Keywords
- Blends
- Hydrogen bonding
- Miscibility
- Nitro-substituted polybenzimidazole (PBI)
- Phase separation
- Polyetherimide (PEI)