High molecular weight polyaniline films

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Nitrogen-containing reactant

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252500, 524606, 525540, 528480, 428364, C08G 7300, H01B 100

Patent

active

054848849

ABSTRACT:
Substantially amorphous, high molecular weight polyaniline which is processable into shaped articles such as fibers is disclosed. Polyaniline base made by standard procedures is subjected to extraction to remove impurities and lower molecular weight fractions. The resulting high molecular weight base, which is partially crystalline and insoluble in NMP and concentrated H.sub.2 SO.sub.4, is converted to an amorphous material soluble in NMP and concentrated H.sub.2 SO.sub.4, by a two step process involving conversion to a salt, and reconversion to a base. Fibers prepared from the high molecular weight material exhibit conductivities in the range of about 50 to 100 S/cm.

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