The synthesis of a precursor of polybenzimidazole (PBI) and blends with polyamic acid (PAA)
1993; Wiley; Volume: 31; Issue: 13 Linguagem: Inglês
10.1002/pola.1993.080311301
ISSN1099-0518
AutoresSoHee Kim, Eli M. Pearce, T. K. Kwei,
Tópico(s)biodegradable polymer synthesis and properties
ResumoAbstract The precursor of polybenzimidazole (PBI), poly(3,3′‐diamino‐4,4′‐benzidine isophthalamide) (PDABI), was synthesized from poly(3,3′‐dinitro‐4,4′‐benzidine isophthalamide) (PDNBI) by reduction. With increasing temperature, the NH 2 moiety which was protected by SnCl 5 −1 could cyclize and form PBI. Blends with polyamic acid (LaRC‐TPI) were prepared. Clear blend films were prepared at up to 400°C. The IR spectra displayed shifts in the NH stretching band, thereby providing evidence for specific interactions related to the miscibility of their cured blends. © 1993 John Wiley & Sons, Inc.
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