Radiation induced nano-scale free volume modifications in amorphous polymeric material: a study using positron annihilation lifetime spectroscopy

Radiation exposure modifies the nano scale free volume of the polymers which has direct correlation to certain properties of polymeric materials. CR-39 (DOP) polycarbonate polymeric films were exposed to gamma radiation at different doses for the study of nano scale free volume as well as structural...

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Published inJournal of radioanalytical and nuclear chemistry Vol. 314; no. 3; pp. 1659 - 1666
Main Authors Kumar, Rajesh, Singh, Paramjit, Gupta, S. K., Gupta, R., Jaiswal, M. K., Prasad, M., Roychowdhury, A., Chauhan, R. P., Das, D.
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Netherlands 01.12.2017
Springer
Springer Nature B.V
Subjects
Amorphous materials
Chemistry
Chemistry and Materials Science
Diagnostic Radiology
Energy gap
Gamma rays
Hadrons
Heavy Ions
Inorganic Chemistry
Nuclear Chemistry
Nuclear energy
Nuclear Physics
Optical properties
Physical Chemistry
Polycarbonates
Polymer films
Positron annihilation
Radiation effects
Spectrum analysis
Free volume
Gamma radiation
UV–visible
Positron annihilation lifetime spectroscopy
CR-39 (DOP)
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Summary:Radiation exposure modifies the nano scale free volume of the polymers which has direct correlation to certain properties of polymeric materials. CR-39 (DOP) polycarbonate polymeric films were exposed to gamma radiation at different doses for the study of nano scale free volume as well as structural and optical properties. An overall increase in the number of free volume holes at all doses was observed. UV–visible studies showed an improvement in the optical properties due to decrease in direct band gap energy. X-ray diffraction spectra of the polymer samples showed the increased amorphous nature of the polymer.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-017-5510-9