Glass-rubber transition temperature of polyaniline: Experimental and molecular dynamic simulation

Available literature reports wide variation of glass-rubber transition temperature (T-g) of polyaniline (PAni). The present study determines the T-g of doped PAni using different techniques such as differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), temperature dependent DC conductivity, and dilatometry, and it is found to vary between 30 and 40 degrees C. Apart from measurement techniques the T-g of PAni is found to depend on the water and dopant present in it. The T-g of PAni is again determined through molecular dynamic (MD) simulation technique and found to be in agreement with the experimentally obtained results. (C) 2009 Elsevier B.V. All rights reserved.