Melting transition in the leucoemeraldine form of polyaniline

Exploitation of the redox properties of polyaniline has made possible the formation of a meltable crystalline phase in the leucoemeraldine base form of the polymer. Both fibres and films exhibiting the melting transition were prepared from leucocemeraldine base/N,N-€²-dimethyl propylene urea solutions. This melting behaviour is confirmed by a battery of experimental methods: thermogravimetric analysis, differential scanning calorimetry, optical microscopy, dynamic mechanical analysis and x-ray diffraction. This melting transition raises the possibility of future melt processing of polyaniline.