Effect of electron irradiation on optical, thermal and electrical properties of polymer electrolyte

Autor:	Ganesh Sanjeev, Vikash Chandra Petwal, V. Ravindrachary, R. Padmakumari, Vijay Pal Verma, R. Sahanakumari, Pratheeka Tegginamata, B. K. Mahantesha
Rok vydání:	2019
Předmět:	chemistry.chemical_classification Materials science Band gap Health Toxicology and Mutagenesis Transition dipole moment Thermal decomposition Public Health Environmental and Occupational Health Polymer Activation energy Photochemistry Pollution Analytical Chemistry Dipole Nuclear Energy and Engineering chemistry Electron beam processing Radiology Nuclear Medicine and imaging Irradiation Spectroscopy
Zdroj:	Journal of Radioanalytical and Nuclear Chemistry. 322:19-27
ISSN:	1588-2780 0236-5731
DOI:	10.1007/s10967-019-06462-4
Popis:	Effects of 10 MeV electron beam irradiation on KBr/PVA composite films were studied using various experimental methods. The FTIR study shows that the irradiation produces chemical modification within the composite. The change in the optical properties like, increment in the transition dipole moment, dipole strength, dipole length, oscillator strength, optical activation energy and decrement in the optical band gap with radiation dose were observed from the UV–Vis study. These results may be attributed to the change in molecular ordering, creation of defects and formation of charge transfer complex incurred due to irradiation. Furthermore, the electrical conductivity increases with irradiation dose; initially due to crosslinking of polymer chains (below 150 kGy) and then due to chain scission (after 150 kGy). The TGA study reveals that the polymer chain crosslinking leads to enhancement in the onset temperature (T0) at lower dose and the scissioning of polymer chains leads to the decrement in the onset temperature at higher dose. Moreover, the activation energy of thermal decomposition is in good agreement with the value of onset temperature. This indicates that the crosslinking is predominantly high at lower doses and cleavage occurs at higher dose. The study reveals that the electron beam irradiation is a powerful tool to modify the optical, thermal and electrical properties of polymer electrolyte.
Databáze:	OpenAIRE
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