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

  • B. K. Mahantesha
  • V. RavindracharyEmail author
  • R. Padmakumari
  • R. Sahanakumari
  • Pratheeka Tegginamata
  • Ganesh Sanjeev
  • V. C. Petwal
  • V. P. Verma


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.


Electron irradiation Polymer electrolyte Crosslinking Chain scission Dipole moment Degradation 



The authors are thankful to CeNSE, Indian Institute of Science, Bangaluru, funded by the Ministry of Electronics and Information Technology (MeitY), Govt of India for extending experimental facilities.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.Department of PhysicsMangalore UniversityMangalagangotriIndia
  2. 2.Raja Ramanna Centre for Advanced Technology, Department of Atomic EnergyGovernment of IndiaIndoreIndia

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