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

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,...

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Bibliographic Details
Published in:	Journal of radioanalytical and nuclear chemistry Vol. 322; no. 1; pp. 19 - 27
Main Authors:	Mahantesha, B. K., Ravindrachary, V., Padmakumari, R., Sahanakumari, R., Tegginamata, Pratheeka, Sanjeev, Ganesh, Petwal, V. C., Verma, V. P.
Format:	Journal Article
Language:	English
Published:	Cham Springer International Publishing 01-10-2019 Springer Springer Nature B.V
Subjects:	Activation energy Analysis Chain scission Chains (polymeric) Charge transfer Chemistry Chemistry and Materials Science Crosslinked polymers Crosslinking Diagnostic Radiology Dipole moments Electric properties Electrical conductivity Electrical properties Electrical resistivity Electrolytes Electron beams Electron irradiation Electrons Hadrons Heavy Ions Inorganic Chemistry Nuclear Chemistry Nuclear energy Nuclear Physics Optical properties Organic chemistry Physical Chemistry Polymers Povidone Radiation Radiation dosage Thermal decomposition Degradation Crosslinking Chain scission Polymer electrolyte Electron irradiation Dipole moment
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Summary:	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 ( T 0 ) 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.
ISSN:	0236-5731 1588-2780
DOI:	10.1007/s10967-019-06462-4