Study the Reaction Conditions for the Chemically Polymerized Aniline Films

Abstract

Conducting polymers have emerged as an important class of electronic materials because of their potential applications in solid state batteries, electrochromic displays and microelectronic devices, etc. a large number of conducting polymers such as polyacetylene, polypyrrole and polythiophene etc, have been synthesized and characterized in recent past. Among these polyaniline( PANI) family of conjugated polymers has been considered as extremely interesting and unusual member of polymers having the delocalized p electrons. Conducting polyanilines are basically poly (paraphenylene amineimine) in which its oxidation state can be varied from the fully oxidized (pemigraniline) to fully reduced (leucoemeraline) states. The most stable emeraldine state refers to 50% oxidized form ofPANI. A numbers of studies on PAN! relating to its structure, morphology, • electrochromic and solid state properties have been reported in the literature. In spite of these interesting developments, the basic chemistry and physics of PANI has not yet been completely elucidated. The present thesis is a systematic attempted towards the solution of some problems encountered in relation to the synthesis and characterization The first chapter divided to two parts. The first part deals with an up-to-date review in relation to PANI polymer. The aim of this part is to enlighten research works done on PANI after a state of the art on the synthesis, mechanism of polymerization, PANI doping, deposition methods of thin PANI films and application of PANI. The second part of the introduction deals with the basic theory of the technique used which is the quartz crystal microbalance (QCM). This part includes an introduction about piezoelectricity, development of piezoelectric quartz crystal mass sensing, QCM solution phase sensing and application of QCM sensors