Polybenzimidazole Celazole

The interaction forces between the acidic and basic blend component include electrostatic and hydrogen bridge interaction. The sulfonated poly(ethersulfones) and poly(etherketones) were combined both with commercially available basic polymers (e.g., polybenzimidazole Celazole (Celanese), poly(4-vinylpyridine), polyCethylene imine)), and with self-developed basic polymers derived from poly(ethersulfones) [47] and poly(etherketones), including polymers that carry both sulfonic and basic groups onto the same backbone [48]. A wide variety of acid-base blend membranes with a broad property range were obtained. The most important characterization results of the ionically cross-linked ionomer membranes are... 

POLYBENZIMIDAZOLES. These are heterocyclic polymers that have outstanding high thermal characteristics, the highest obtainable in commercial polymers. These materials also have superior ablative and hydrolytic stability as well as high compressive and dimensional stability. Polybenzimidazoles essentially arc unaffected by solvents, acids, and bases. They are marketed in stock shapes and as finished parts. The materials are not available in resin form Hoechst Celanese markets tile products under tile tradename Celazole, ... 

Polyimide / Du Pont s Kapton Polybenzimidazole / Celanese s Celazole... 

Ketron), pol5dmide (Vespel SP-1), polyphenylsulfone (Radel R) and sintered polybenzimidazole (PBI) (Celazole). These materials were unfilled or neat without any flame-retardant additives. 

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