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Polyaniline (PANI) base has been suspended in 9M potassium hydroxide at 20°C or 90°C for various time intervals extending to 4 months. The fraction of acetone-soluble material increased from 1.2wt.% to 4.5wt.% after exposure to an alkaline medium for 60 days at 20°C. Gel-permeation chromatography indicates that the aggregation of PANI is reduced, while the chain degradation itself is negligible. FTIR...
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