THERMAL DOPING OF POLYANILINE WITH DODECYLBENZENE SULFONIC-ACID WITHOUT AUXILIARY SOLVENTS

The doping of polyaniline has been achieved by introducing the dopant molecule into the solid, undoped polymer without the use of an auxilia ry solvent. Complex formation in the solid phase occurs at elevated te mperatures and results in the formation of a soluble and processable c onducting complex. The complexation was followed by calorimetric studi es during a heating scan and the exothermic heat complexation has been observed for the first time. The doping process is similar to the oxi dation of an emeraldine base with traditional protonic acid doping, as observed by u.v. and i.r. spectroscopies. The improved processing con ditions may be the result of the formation of a layered structure with strongly anisotropic characteristics, as determined by X-ray diffract ion measurements.