Structure dependence of gamma ray irradiation effects on polyurethane and epoxy resin studied by PAL technique

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Structure dependence of gamma ray irradiation effects on polyurethane and epoxy resin studied by PAL technique
Published: Feb 4, 2019
DOI: https://doi.org/10.30723/ijp.v13i27.274
Keywords:
Polyurethane, Epoxy resin, PAL technique.

Main Article Content

Hayder S. Hussain

Abstract

Positron annihilation lifetime (PAL) technique has been employed to
study the microstructural changes of polyurethane (PU), EUXIT 101
and epoxy risen (EP), EUXIT 60 by Gamma-ray irradiation with the
dose range (95.76 - 957.6) kGy. The size of the free volume hole and
their fraction in PU and EP were determined from ortho-positronium
lifetime component and its intensity in the measured lifetime spectra.
The results show that the irradiation causes significant changes in the
free volume hole size (Vh) and the fractional free volume (Fh), and
thereby the microstructure of PU and EP. The results indicate that
the γ-dose increases the crystallinity in the amorphous regions of PU
and increase the cross-linking of EP.

Article Details

How to Cite
1.
Hussain HS. Structure dependence of gamma ray irradiation effects on polyurethane and epoxy resin studied by PAL technique. IJP [Internet]. 2019 Feb. 4 [cited 2024 Dec. 19];13(27):157-63. Available from: https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/274
Issue
Vol. 13 No. 27 (2015)
Section
Articles
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This work is licensed under a Creative Commons Attribution 4.0 International License.

© 2023 The Author(s). Published by College of Science, University of Baghdad. This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License. 

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