Abstract
The optical transmission and UV-VIS absorption spectra have been recorded in the wavelength range (200-1100m) for different composition of polyaniline and polyvinyl Alcohol(PVA ) blends thin films. Polyaniline was prepared in acidic medium to enhancement the solubility and processibility, The optical energy gap (Eopt) refractive index and optical dielectric constant real and imaginary part have been evaluated. The effects of doping percentage of prepared polyaniline on these parameters was discussed and the non –linear behavior for all these parameters was investigated.
Highlights
Conducting polymers have become very popular in the field of material science due to their promising and novel electrical and optical properties .Preparation of blends of polyaniline (PANI) has been considered to improve the processability of PANI
Since the conductivity of PAni depends on both the oxidation state of the main polymer chain as well as the degree of protonation of the imine sites (MacDiarmid 2001)[3], polyaniline can be prepared in three major forms that differ in the degree of oxidation (Y)
We have found that the energy gap decreases with the concentration percentage of PANI, this decreasing in the optical energy gap can be explained
Summary
Conducting polymers have become very popular in the field of material science due to their promising and novel electrical and optical properties .Preparation of blends of polyaniline (PANI) has been considered to improve the processability of PANI. These blends have the ability to enhance their material properties with desirable mechanical and physical characteristics (Raghavendra et al 2003)[1]. Since the conductivity of PAni depends on both the oxidation state of the main polymer chain as well as the degree of protonation of the imine sites (MacDiarmid 2001)[3], polyaniline can be prepared in three major forms that differ in the degree of oxidation (Y) Exprimental This part presents raw materials and preparation method used to prepare PVA/PANI blends in different weight present
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