Physico-chemical transformations in swift heavy ion modified poly(ethyleneterephthalate)

Aggarwal, Prerna and Singh, Virendra and Singh, Arjun and Scherer, U.W. and Singh, Tejvir and Singla, M.L. and Srivastava, Alok (2012) Physico-chemical transformations in swift heavy ion modified poly(ethyleneterephthalate). Radiation Physics and Chemistry, 81 (3). pp. 284-289. ISSN 0969-806X

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Abstract

Thin films of poly(ethyleneterephthalate) (PET) were exposed to different radiation dose brought about by 80 MeV carbon and 98 MeV silicon ion beam. The UV–vis absorption studies reveal that there is decrease in optical band gap energy to the extent of ∼29.3 and 42.1%. The X-ray diffraction analyses have shown that crystallite size decreased by ∼18.6 and 52.6%, indicating amorphization of PET. The colour of PET films change from colourless to light yellowish followed by light brown as radiation dose is increased. The colour formation has been ascribed to an increase in conjugation in the carbon chain. In the case of PET irradiated with carbon ion, the electrical conductivity increased with frequency beyond a threshold value of 1 kHz. The increase in conductivity of PET films on irradiation is due to formation of defects and carbon clusters as a result of polymer chain scission. The thermal study further confirmed the increase in amorphous nature with increase in radiation dose. The results indicate that radiation dose brings about significant physicochemical transformations in PET.

Item Type: Article
Uncontrolled Keywords: Poly(ethyleneterephthalate); Optical study; Electrical study; Carbon ions;Silicon ions
Subjects: CSIO > Chemistry
Depositing User: Ms. J Shrivastav
Date Deposited: 23 Apr 2012 11:14
Last Modified: 23 Apr 2012 11:14
URI: http://csioir.csio.res.in/id/eprint/251

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