Pramana

, Volume 20, Issue 1, pp 85–90 | Cite as

Radiation damage in polyacrylonitrile

  • M Ramakrishna Murthy
  • S Radhakrishna
Solid State Physics
Received:

Abstract

Radiation damage in polyacrylonitrile (PAN) has been studied in the temperature range 273 to 420 K using thermoluminescence, electron spin resonance and optical absorption techniques. ATL glow peak has been observed with maximum at 362 K. The species responsible for theTL glow peak has been identified to be due to the free radical -CH2-CH(CN)-ĊH-CH(CN)-CH2-by correlation with the data obtained by the temperature variation ofESR and optical absorption spectra of thex-irradiated, pre- and post-x-irradiated and thermally-treated samples. A mechanism of formation of network structures accelerated by the free radicals formed on irradiation has been investigated to explain the optical absorption spectra. TheTL glow peak is analysed by various methods and corresponds to an activation energy of 1 eV, following second order kinetics.

Keywords

Radiation damage polyacrylonitrile thermoluminescence optical absorption electron spin resonance 
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Copyright information

© Indian Academy of Sciences 1982

Authors and Affiliations

  • M Ramakrishna Murthy
    • 1
  • S Radhakrishna
    • 1
    • 2
  1. 1.Department of PhysicsKakatiya UniversityWarangalIndia
  2. 2.Department of PhysicsIndian Institute of TechnologyMadrasIndia

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