الفهرس 
Theoretical Background and literature SurveyOnly 14 pages are availabe for public view
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Abstract
This present work focuses on preparing and characterizing a polymer blend Carboxymethyl cellulose (CMC) filled with low different weight concentrations of Polypyrrole (PPy). The blended films have been synthesized by solution casting method.
Different techniques had been used to study the physical properties of the prepared films such as:
For structural properties:
1. X-ray diffraction (XRD).
2. Fourier transform infrared (FT-IR) spectroscopy.
For thermal properties:
1. Differential scanning calorimetry (DSC).
2. Thermogravimetric (TG).
For electrical properties:
1. AC electrical conductivity
For surface nature:
1. Scanning electron microscopy (SEM)
2. Atomic force microscopy (AFM (
For optical properties:
1. Ultraviolet and visible (UV-Vis) spectroscopy.
XRD results indicates the semi-crystalline nature of pure CMC polymer by the presence of peak centered at 2θ = 22.13◦. The decrease in the 22.13◦ peak intensity with the increase in PPy contents is a good indication of the rise in amorphous regions inside the CMC matrix. The structural changes and interaction between the carboxymethyl cellulose and polypyrrole were observed in FT-IR spectra.
The absorbance, absorption coefficient, optical conductivity, the band gap metallization criteria (MEg), and the refractive index (n) of the CMC/PPy samples were carefully studied. The Urbach energy (Eurb) has attained a significant enhancement where its value was increased from 0.79 eV for pure CMC to 1.7 eV for the sample with 10 wt. % of PPy (CMC/10 wt. % PPy), improving its optical properties.