Assessment of Spectroscopic Characterization of Pure and Malachite Green Doped Polysulfone Samples by X-Ray Diffraction (XRD), UV- Visible and Scanning Electron Microscopy (SEM) Techniques

Abstract

When subjected to a field – temperature treatment, polymers have strong dielectric characteristics because they can permanently store charge. By impregnating polymers with suitable dopants, the electret state and carrier mobility of the polymer can be substantially influenced.The establishment of a charge transfer connection between the acceptor and donor molecules improves the electrical conductivity of the polymer when it is doped with a low molecular weight organic component. The structural alteration in pure polymer with increasing impurity ratio is illustrated using spectroscopic techniques.  Polysulfone is employed as the host polymer and malachite Green is used as the dopant in this study. Isothermal immersion was used to prepare samples of pure and malachite green doped Polysulfone in the form of foil. For the pure sample, 4 gm Polysulfone was dissolved in 50 ml Dimethyl farmamide (DMF) solvent, whereas for the doped sample, 15, 35, 65, and 110 mg Malachite Green were combined with 4 gm Polysulfone, respectively. X-Ray Diffraction Spectroscopy (XRD), UV- Visible Spectroscopy, and Scanning Electron Microscope (SEM) techniques were employed to investigate the structural and optical characterisation of these pure and doped samples.  Pure and doped polysulfone XRD diffractograms reveal both sharp and diffused peaks, which correspond to the crystalline and amorphous areas of the polymer, respectively. When examining the variation of intensity with two theta angles, it is found that the highest intensity for pure samples is 18.380, while the maximum intensity for doped samples is 18.610, 18.890, 20.520, and 21.110, respectively, due to the increase in doping ratio. This finding supports polysulfone's amorphous character being enhanced. The transmittance of pure polysulfone diminishes as the ratio of doping increases, according to a UV-visible spectroscopy investigation. The reduction in intensity of transmittance of pure sample is clearly apparent in the present case and some new peaks are also observed. This activity suggests the formation of Charge Transfer Complexes (CTC) between the donor and acceptor molecules, implying that the electrical characteristics of the Polysulfone polymer have improved. The micro structural properties of pure and doped samples were studied by Scanning Electron Microscopy (SEM). This study shows uniform dispersion of dopant malachite green and polysulfone.The purpose of the present study is to observe the improvement in the charge storage capacity of the polysulphone under different doping ratio of Malachite Green.