Changes in mechanical properties due to gamma irradiation of high-density polyethylene (HDPE)

Brazilian Journal of Chemical Engineering. 2007;24(2):259-265 DOI 10.1590/S0104-66322007000200010


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Journal Title: Brazilian Journal of Chemical Engineering

ISSN: 0104-6632 (Print); 1678-4383 (Online)

Publisher: Brazilian Society of Chemical Engineering

LCC Subject Category: Technology: Chemical technology: Chemical engineering

Country of publisher: Brazil

Language of fulltext: English

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S. S. Cota
V. Vasconcelos
M. Senne Jr.
L. L. Carvalho
D. B. Rezende
R. F. Côrrea


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Time From Submission to Publication: 12 weeks


Abstract | Full Text

This paper presents an experimental analysis of the effect of dose and dose rate parameters during gamma irradiation of high-density polyethylene (HDPE) samples. Considerations concerning the influence of these parameters on HDPE mechanical strength properties as a result of the predominance of oxidative degradation or of cross-linking are presented. The experimental results show an improvement of HDPE mechanical strength as dose increases, indicating the predominance of cross-linking over oxidative degradation and that lower doses are necessary to obtain a similar change in resistance parameters when radiation is applied at lower dose rates, showing that gamma radiation affects the HDPE in a more efficient way at lower dose rates.