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
Full-text formats available: PDF, HTML, XML
S. S. Cota
M. Senne Jr.
L. L. Carvalho
D. B. Rezende
R. F. Côrrea
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.