Positron annihilation study of iodine sorption in acrylonitrile-butadiene-styrene

Ramani, R. and Ramachandra, P. and Ramgopal, G. and Ranganathaiah, C. (1998) Positron annihilation study of iodine sorption in acrylonitrile-butadiene-styrene. Journal of Applied Polymer Science, 68 (13). pp. 2077-2085.

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The influence of iodine on the free volume of acrylonitrile-butadiene-styrene (ABS) was investigated by positron annihilation lifetime spectroscopy (PALS). The results indicate the filling of free-volume holes, formation of a positronium-iodine compound (PsI(2)/PsI), and possible charge-transfer complexes (CTCs) in the initial stages and the swelling of iodine in the final stages of sorption. The present study also revealed that iodine acts as a chemical quencher of o-Ps. The average size of the free volume suggests that Ig is the predominant species that fills up the free-volume holes during iodination. The diffusion process in the present case shows non-Fickian behavior and deviates from Fujita's free-volume concept as far as the fractional free volume and diffusion coefficient are concerned. (C) 1998 John Wiley & Sons, Inc.

Item Type: Article
Subjects: D Physical Science > Physics
Divisions: Department of > Physics
Depositing User: Users 23 not found.
Date Deposited: 08 Jun 2021 06:56
Last Modified: 04 Jul 2022 09:31
URI: http://eprints.uni-mysore.ac.in/id/eprint/16709

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