The thermal stability of poly 2,2′-(M-phenylene)-5,5′-bibenzimidazole
✍ Scribed by Phillips, R. ;Wright, W. W.
- Book ID
- 104532951
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1964
- Tongue
- English
- Weight
- 104 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0449-2986
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## Abstract Copolymers of poly(2,5‐benzimidazole) (ABPBI) and poly[2,2′‐(__p__‐phenylene)‐5,5′‐bibenzimidazole] (__p__PBI) were synthesized for use as fuel cell membranes to take advantage of the properties of both constituents. The composition of the copolymers were controlled by changing the feed
To prepare organo-soluble poly[(2,2,Ј-m-phenylene)-5,5Ј-bibenzimidazole] (PBI) with high yield, a homogeneous nitration of PBI was attempted. Nitro-substituted PBI (NO 2 -PBI) was synthesized through the homogeneous reaction of the PBI powder with nitric acid in sulfuric acid. The degree of substitu