Investigations on some selected conducting polymers and polymer ...

feed ratios are synthesized and their structural, morphological, thermal
and electrical (including thermo power) properties are investigated.
CHAPTER6 deals with the optical transition energy gap analysis of
some selected conducting polymer films. The films are prepared by solution
casting technique. Negative energy gap has been observed for the first time
in conducting polymer films, corresponding to indirect allowed transition.
In CHAPTER7, thermal diffusivities of PANI and PANI-MWNT
composite samples with various aniline to MWNT feed ratios are
investigated, using photo acoustic technique.
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The conclusions drawn from the present investigations are
summarized in CHAPTER8.The major achievements of the present
investigations and the scope for further studies are also highlighted.
The major highlights ofthe investigations are,
1. A comparative study ofthe photoluminescence intensities ofthe
PANI(Polyaniline) samples doped with various acids are
attempted for the first time.PANI doped with orthophosphoric
acid exhibits the highest photo luminescent emission intensity,
making it a suitable material for optoelectronic device
fabrication.
2. PANI nano rods exhibit good D.C electrical conductivity and
thermal stability.
3. The photoluminescence emission intensity as well as D.C electrical
conductivity ofPAN1-PMMA(Polymethylmethacrylate) composites
is found to increase with increase in PMMA content in the
composite up to a particular feed ratio of aniline to PMMA and
thereafter decreases.