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Analysis Study Research Paper | Physics Science | India | Volume 12 Issue 9, September 2023
High Dose Gamma Radiation Induced Modifications in Chemical, Electrical and Morphological Properties of PES Polymer
Abstract: Polyethersulfones is a high temperature amorphous engineering material with excellent thermal properties and have an ability to retain many mechanical and electrical properties up to 200oC temperature. We have studied the Chemical, Electrical and Morphological properties of virgin and high dose (500-2000 kGy) ?-irradiated samples of PES polymer. The polymer samples were analysed by using Fourier transforms infrared (FTIR) spectrophotometer, with 0.5 wave number resolution in the range (4300-500 cm-1). While comparing the FTIR spectra the increase in the intensity of the characteristic bands may be attributed to breakage of chemical bonds and elimination of low molecular gases due to gamma irradiation. The dielectric studies were carried out by using High Frequency Impedance Analyzer (PSM 1735) over the frequency range of 10 Hz?30 MHz at ambient temperature. In this study it is found that with increase of radiation dose the dielectric constant increases may be due to scissioning of polymer chains and the migration of long lived radicals from crystalline region to amorphous region. The surface morphology of PES polymer was characterized by scanning electron microscope (SEM) using (JEOL, Model No. 3300) operating at 30 kV accelerating voltage. The size of the blisters are found to be increased with the increasing of irradiation dose, may be due to the increasing gas pressure near the top surface of the sample. From the SEM micrographic, significant changes observed only when the micrographs of gamma irradiated PES polymer samples are compared with the virgin sample.
Keywords: Gamma irradiation; PES; FTIR; Frequency Impedance Analyzer; SEM
Edition: Volume 12 Issue 9, September 2023,
Pages: 211 - 217