Variation of lexan polycarbonate properties by electron beam

Hareesh, K. and Ranganathaiah, C. and Ramya, P. and Bhargavi, R. and Nair, G. G. and Sangappa and Sanjeev, G. (2013) Variation of lexan polycarbonate properties by electron beam. Journal of Applied Polymer Science, 127 (3). pp. 2010-2018.

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The modifications in microstructural, optical, and photoluminescence properties of the Lexan polycarbonate (bisphenol-A-polycarbonate) films exposed to different electron doses have been studied using UV-vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), positron annihilation lifetime spectroscopy, photoluminescence spectroscopy, and scanning electron microscopy (SEM). The obtained UV-vis spectroscopy results showed decrease in optical energy gap, optical activation energy, and increase in number of carbon atoms per cluster with increase in electron dose. The chemical changes in electron irradiated polymers due to chain scission and reconstruction have been observed from FTIR spectroscopy. The correlation of positron lifetime study with optical measurement is obtained, and electron irradiation-induced microstructural modifications within the polymer is understood. SEM result shows the degradation of Lexan polymer after electron irradiation. The mechanical properties and average molecular weight of Lexan decrease after irradiation, whereas average number of chain scissions per original polymer molecule increases.

Item Type: Article
Uncontrolled Keywords: Electron beams, Electron irradiation, Micro-structural, Polymers, Phenols, Fourier transform infrared spectroscopy, FTIR, FTIR spectroscopy, Positron annihilation spectroscopy, Activation energy, Mechanical properties, Polycarbonates, Scanning electron microscopy, Crosslinking, Chain scission, Electron beam irradiation, Positron annihilation lifetime spectroscopy, Positron lifetime study, Average molecular weight, Average numbers, Carbon atoms, Chemical change, Electron dose, Electron irradiated polymers, Lexan polycarbonates, Microstructural modification, Optical activation energy, Optical data processing, Optical energy gap, Optical measurement, Photoluminescence properties, Photoluminescence spectroscopy, Polymer molecule, Ultraviolet visible spectroscopy, UV-vis spectroscopy
Subjects: D Physical Science > Physics
Divisions: Department of > Physics
Depositing User: Arshiya Kousar Library Assistant
Date Deposited: 12 Sep 2019 05:32
Last Modified: 12 Sep 2019 05:32

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