THERMAL-ANALYSIS OF POLYANILINE FREE STANDING FILMS

Milton, AJ; Monkman, AP

Abstract

We report on Dynamic Mechanical Thermal Analysis (DMTA) studies of free standing films of polyaniline. These films were cast from chemically synthesised emeraldine base dissolved in the solvent N-methyl-2-pyrrolidinone (NMP). Thermal scans show a softening 'T(g) process' for such films at approximately 100-degrees-C. This occurs as solvent molecules are being removed from the samples. The exact transition temperature is dependent on the weight fraction of the NMP solvent and increases with decreasing solvent content. Above 180-degrees-C a crosslinking of the polymer chains occurs resulting in a hardening of the films. This crosslinked material is characterised by a new transition at 265-degrees-C. A low temperature transition is also seen at -80-degrees-C. This is interpreted as a torsional motion of the aromatic rings in the polymer chains.

Citation

Milton, A., & Monkman, A. (1993). THERMAL-ANALYSIS OF POLYANILINE FREE STANDING FILMS. Synthetic Metals, 57(1), 3571-3575

• Journal Article Type: Article
• Publication Date: 1993-04
• Journal: Synthetic Metals
• Print ISSN: 0379-6779
• Publisher: Elsevier
• Volume: 57
• Issue: 1
• Pages: 3571-3575