Journal of Nuclear Science, Engineering and Technology (JONSAT)
In cooperation with the Iranian Nuclear Society

Investigation of the effects of gamma irradiation with different doses on the mechanical and structural properties of Teflon

Document Type : Research Paper

Authors

H. Soofi 1
M.M.R. Seyedhabashi 2
M. Mohammadian Kohal 3
S. Golshah 4

1 Department of Physics, Islamic Azad University Central Tehran Branch, P.O.Box: 14696691941, Tehran - Iran

2 Plasma and Nuclear Fusion Research School, Nuclear Science and Technology Research Institute, AEOI, P.O. Box: 14399-51113, Tehran -Iran

3 Nuclear Engineering Department, Faculty of Advanced Science and Technology, University of Isfahan, P.O.Box: 8486-11365, Isfahan -Iran

4 Materials and Energy Research Institute, Iran Space Research Institute, Ministry of Communications and Information Technology, P.O.Box: 174-81955, Isfahan -Iran

https://doi.org/10.24200/nst.2021.1196
Abstract
Due to the importance of Teflon in the military industries, especially the missile and aerospace industries, the study of the effect of different nuclear radiation on the physical properties of this polymer can greatly assist the fabrication and engineering process of the components used in its manufacture. In this study, Teflon tape was cut into six bands, and then five bands were irradiated with different absorbed doses of gamma radiation up to 12 kGy. Moreover, the tensile test to evaluate the mechanical properties, and the FTIR spectra to investigate the changes in the structural properties, were obtained from Teflon samples. Through the structural studies, variations such as the formation of double bond in the structure of irradiated Teflon strips were observed. Also, the reduction of the stress and the strain values ​​at the final strength and rupture point were observed by studying the mechanical parameters of the Teflon strips. It was concluded that in the irradiated Teflon strip structure, double bonds are formed which is a sign of major chain failure. Furthermore, no improvement in mechanical properties was observed.

Highlights

1. Karl Tate, Space Radiation Threat to Astronauts Explained (Infographic), (2013), http://www. space. com/21353-space-radiation-mars-mission-threat.html.

 

2.   A. Smedberg, T. Hjertberg, B. Gustafsson, Crosslinking reactions in an unsaturated low density polyethylene. Polymer, 38(16), 4127-4138 (1997).

 

3.   Y. Rosenberg, et. Al, Low dose γ‐irradiation of some fluoropolymers: effect of polymer chemical structure. Journal of Applied Polymer Science,  45(5), 783-795 (1992).

 

4.   A. Oshima, et. al, Chemical structure and physical properties of radiation-induced crosslinking of polytetrafl-uoroethylene, Radiation Physics and Chemistry, 62(1), 39-45 (2001).

 

5.   R. Meyer, F. Bouquet, R. Alger, Radiation induced conductivity in polyethylene and teflon. Journal of Applied Physics, 27(9), 1012-1018 (1956).

 

6.   D. Sinha, Structural modifications of gamma irradiated polymers: an FT-IR study. Advances in Applied Science Research, 3(3), 1365-1371 (2012).

 

7.   ASTM: Standard test method for tensile properties of thin plastic sheeting-D882–02. Annual book of American standard testing methods(2002).

 

8.   A. Maxwell, et. al, Review of accelerated ageing methods and lifetime prediction techniques for polymeric materials. (2005).

 

9.   J. Mihály,  et. al, FTIR and FT-Raman spectroscopic study on polymer based high pressure digestion vessels. Croatica Chemica Acta, 79(3), 497-501 (2006).

 

10. G.M. Lampman, G.S. Kriz, J. Vyvyan, Introduction to spectroscopy: A guide for students of organic chemistry, Harcourt College Publishers, (2001).

Keywords

Teflon
Chemical structure
Mechanical properties
Gamma irradiation
1. Karl Tate, Space Radiation Threat to Astronauts Explained (Infographic), (2013), http://www. space. com/21353-space-radiation-mars-mission-threat.html.
 
2.   A. Smedberg, T. Hjertberg, B. Gustafsson, Crosslinking reactions in an unsaturated low density polyethylene. Polymer, 38(16), 4127-4138 (1997).
 
3.   Y. Rosenberg, et. Al, Low dose γ‐irradiation of some fluoropolymers: effect of polymer chemical structure. Journal of Applied Polymer Science,  45(5), 783-795 (1992).
 
4.   A. Oshima, et. al, Chemical structure and physical properties of radiation-induced crosslinking of polytetrafl-uoroethylene, Radiation Physics and Chemistry, 62(1), 39-45 (2001).
 
5.   R. Meyer, F. Bouquet, R. Alger, Radiation induced conductivity in polyethylene and teflon. Journal of Applied Physics, 27(9), 1012-1018 (1956).
 
6.   D. Sinha, Structural modifications of gamma irradiated polymers: an FT-IR study. Advances in Applied Science Research, 3(3), 1365-1371 (2012).
 
7.   ASTM: Standard test method for tensile properties of thin plastic sheeting-D882–02. Annual book of American standard testing methods(2002).
 
8.   A. Maxwell, et. al, Review of accelerated ageing methods and lifetime prediction techniques for polymeric materials. (2005).
 
9.   J. Mihály,  et. al, FTIR and FT-Raman spectroscopic study on polymer based high pressure digestion vessels. Croatica Chemica Acta, 79(3), 497-501 (2006).
 
10. G.M. Lampman, G.S. Kriz, J. Vyvyan, Introduction to spectroscopy: A guide for students of organic chemistry, Harcourt College Publishers, (2001).

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