Carbon-ion-induced modifications of the diffusion kinetics in poly (ethylene terephthalate):a free volume study

Ranganathaiah, C. and Shariff, Gani and Avasthi, D. K. (2003) Carbon-ion-induced modifications of the diffusion kinetics in poly (ethylene terephthalate):a free volume study. Radiation Measurements, 36 (1). 629 - 634. ISSN 1350-4487

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Official URL: https://doi.org/10.1016/S1350-4487(03)00214-2

Abstract

The free volume modifications in carbon-ion irradiated poly (ethylene terephthalate) (PET) have been investigated using positron lifetime method and sorption kinetics by the gravimetric method. The positron results indicate the formation of linear tracks and free radicals. Iodine sorption suggests Longmuir type of filling of the free volume sites by iodine in the initial stages of sorption, and in the later stages, swelling and conformational changes dominate. Using dual sorption model, diffusion- and relaxation-controlled sorption have been separated. Further, it has been found that the diffusion process deviates from Fick's law and hence from Fujita's free volume theory for both virgin and C-ion irradiated PET.

Item Type: Article
Additional Information: Proceedings of the 21st International Conference on Nuclear Tracks in Solids
Uncontrolled Keywords: Ion irradiation, PET, -Positronium lifetime, Free volume, Diffusion
Subjects: D Physical Science > Physics
Divisions: Department of > Physics
Depositing User: lpa manjunath user
Date Deposited: 07 Sep 2019 06:26
Last Modified: 07 Sep 2019 06:26
URI: http://eprints.uni-mysore.ac.in/id/eprint/7739

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