Thermoanalytical Studies of Polyaniline ‘Emeraldine base’

The thermal behaviour of polyaniline-‘emeraldine base’ (PANI-EB) was studied using thermogravimetric analysis (TG) and differential scanning calorimetry (DSC). We assume that during heating over 150°C three exothermal processes proceed - reorganization and crosslinking between PANI-EB chains followed by post-polymerization. The low temperature relaxation transition for PANI-EB was registered for the first time by DSC. We suppose that it might be due to the motion of polymer chains non-crosslinked during the first heating, chain fragments resulting from high-temperature decomposition over 300°C and chain ends of the already crosslinked polymer. This revised version was published online in July 2006 with corrections to the Cover Date.