Abstract
The present article focuses on the influence of gamma irradiation and post-irradiation storage conditions on FT-IR spectra of 1 mm thick polystyrene irradiated with 51, 77 and 129 kGy. The increase in amplitude corresponding to 3600, 3400 and 2100 cm− 1 stretching frequencies clearly showing the formation of O–H and C=O bonds (~ 25%). On prolonged storage (2160 h) in the dark, there is an increase in O–H group (~ 28%). The electron cloud facilitates the formation of hydroxyl group in irradiated polystyrene. The post-irradiation treatment with heat conversely showed a reduction of O–H, C–H and C=O (9–16%) groups due to radical–radical recombination at higher temperatures and light intensities. This investigation finds its applications in memory devices, optical sensors, radiation dosimetry and different space and radiation facilities.
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Acknowledgements
We gratefully acknowledge Mr. P. Thillaimani (Technical Officer) and the technical assistants at Central Instrumentation Facility, Pondicherry University. This work was supported by DST-FIST [SR/FST/LSI-366/2008 Dt.18.02.2009] and UGC-SAP [F.4 − 2/2015/DRS-III/(SAP-II) Dt. 31.03.2015].
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Vardhan, P.V., Shukla, L.I. FT-IR investigations on effect of high doses of gamma radiation-induced damage to polystyrene and mechanism of formation of radiolysis products. Radiat Environ Biophys 57, 301–310 (2018). https://doi.org/10.1007/s00411-018-0740-y
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DOI: https://doi.org/10.1007/s00411-018-0740-y