Free Volume Related Fluorescence Properties of Electron Irradiated Chalcone Doped PMMA Films

Ismayil, . and Ravindrachar, V and Bhajantri, Rajashekhar F and Harisha , A and Praveena, S D (2011) Free Volume Related Fluorescence Properties of Electron Irradiated Chalcone Doped PMMA Films. AIP Conference Proceedings, 1349. pp. 196-197.

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Abstract

Effect of electron irradiation on free volume related fluorescence properties of chalcone doped Poly(methyl methacrylate) (PMMA) composite films have been studied using Positron Annihilation and Fluorescence spectroscopic techniques. In this polymer composite, enhancement of fluorescence at lower doses and reduction at higher doses has been observed under electron irradiation. From Positron annihilation studies suggests that at lower doses of irradiation induced crosslinking which affect the free volume properties and inturn hinders the chalcone molecular rotation. At higher doses chain scission process affect matrix relaxation. Under the restricted condition the chromophore molecules likely to emit enhanced fluorescence and its mobility is directly related to the free volume around it.

Item Type: Article
Additional Information: © 2011 American Institute of Physics
Uncontrolled Keywords: Poly(methyl methacrylate) (PMMA); Electron irradiation; Free volume; Crosslinking; Chain scission; Fluorescence
Subjects: Engineering > MIT Manipal > Physics
Depositing User: MIT Library
Date Deposited: 27 Apr 2013 11:33
Last Modified: 27 Apr 2013 11:33
URI: http://eprints.manipal.edu/id/eprint/79899

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