Changes in mechanical properties due to gamma irradiation of high-density polyethylene (HDPE)
Open Access
- 1 June 2007
- journal article
- Published by FapUNIFESP (SciELO) in Brazilian Journal of Chemical Engineering
- Vol. 24 (2), 259-265
- https://doi.org/10.1590/s0104-66322007000200010
Abstract
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 ratesKeywords
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