Abstract
The poly(2-chloroaniline) and poly(2-chloroaniline)/CuO nanocomposites with various weight percentages (5%, 10%, 15%, 20%, and 25%) were synthesized byin situchemical oxidative polymerization method using ammonium per sulphate (oxidant), HCl (dopant), and dodecyl benzene sulphonic acid as a surfactant at 0°C. The formation of polymer and its composites was confirmed by FTIR and UV-Visible spectroscopy. The SEM and X-ray diffraction studies clearly indicate the uniform dispersion of CuO nanoparticles into the polymer matrix. The thermal stability of the polymer and its composites increased with increase in the percentage of CuO nanoparticles. The polymer and composites exhibit fluorescence property and hence can be used in the light emitting diodes. The current voltage (I-V) curves clearly illustrate the enhanced conductivity on light exposure compared to the dark current. The conductivity of the polymer increased with increase in the percentage of CuO nanoparticles. Poly(2-chloroaniline)/CuO nanocomposites with 25% of CuO show a maximum conductivity of2.05×10-4 S cm−1. The composites synthesized behave as organic metals due to their semiconducting nature.
Highlights
Conducting polymers are a class of synthetic metals that combine the chemical and mechanical properties of polymers with the electronic properties of metals and semiconductors [1]
Poly(2-chloroaniline) and poly(2-chloroaniline)/CuO nanocomposites with various weight percentages of CuO (5%, 10%, 15%, 20%, and 25%) were prepared by in situ chemical oxidative polymerization technique using hydrochloric acid as dopant, ammonium per sulphate as an oxidant, and dodecyl benzene sulphonic acid as a surfactant at 0– 5∘C
The resistance and conductivity of poly(2-chloroaniline) and poly(2chloroaniline)/CuO nanocomposites with various weight percentages at constant voltage (5 V) in the presence and absence of light were tabulated in Tables 1 and 2, respectively
Summary
Conducting polymers are a class of synthetic metals that combine the chemical and mechanical properties of polymers with the electronic properties of metals and semiconductors [1]. Poly(2-chloroaniline) and poly(2-chloroaniline)/CuO nanocomposites with various weight percentages of CuO (5%, 10%, 15%, 20%, and 25%) were prepared by in situ chemical oxidative polymerization technique using hydrochloric acid as dopant, ammonium per sulphate as an oxidant, and dodecyl benzene sulphonic acid as a surfactant (it can act as another dopant as well) at 0– 5∘C. This pathway was selected because one expects that the presence of dodecyl benzene sulphonic acid in the polymer composites enhances the solubility, stability, and conductivity in organic solvents and the processability. The thermal properties were studied by TGA and DTA analysis and the electrical conductivities were measured from the I-V graph using two-point probe method
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