Thomas, Zachariah P; Dr.Abdul Rasheed, T M(Cochin University of Science & Technology, March , 2008)
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Abstract:
In the present study, radio frequency plasma polymerization technique
is used to prepare thin films of polyaniline, polypyrrole, poly N-methyl pyrrole
and polythiophene. The thermal characterization of these films is carried out
using transverse probe beam deflection method. Electrical conductivity and
band gaps are also determined. The effect of iodine doping on electrical
conductivity and the rate of heat diffusion is explored.Bulk samples of poyaniline and polypyrrole in powder form are
synthesized by chemical route. Open photoacoustic cell configuration is
employed for the thermal characterization of these samples. The effect of acid
doping on heat diffusion in these bulk samples of polyaniline is also
investigated. The variation of electrical conductivity of doped polyaniline and
polypyrrole with temperature is also studied for drawing conclusion on the nature of conduction in these samples. In order to improve the processability
of polyaniline and polypyrrole, these polymers are incorporated into a host
matrix of poly vinyl chloride. Measurements of thermal diffusivity and
electrical conductivity of these samples are carried out to investigate the
variation of these quantities as a function of the content of polyvinyl chloride.
Description:
Department of Physics,
Cochin University of Science and Technology