Degradation of poly(bisphenol-a-epichlorohydrin) by gamma irradiation |
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| Institution: | 1. University of California, Los Angeles, Department of Earth, Planetary, and Space Sciences, Los Angeles, CA 90095, USA;2. Jet Propulsion Laboratory/California Institute of Technology, Pasadena, CA 91109, USA;1. Department of Mathematics and Physical Sciences, Maasai Mara University, P.O. Box 861-20500, Narok, Kenya;2. Materials Research Institute, DST-NRF Centre of Excellence in Strong Materials and School of Physics, University of the Witwatersrand, Johannesburg Wits 2050, South Africa |
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| Abstract: | In this study, radiation stability of poly(bisphenol-a-epichlorohydrin) (PBEH) was studied via gamma irradiations at two different dose rates of 1540 and 82.8 Gy/h, in order to understand the possible use of PBEH in radioactive waste management as a solidifying agent. The total dose of irradiation was up to 2150 kGy. Degradation nature was tested by studying the changes in mechanical and thermal properties with the change of dose rate and total dose of irradiation. Tensile strength at yield was increased first then decreased when irradiated, while toughness decreased. The half value dose (HVD) of elongation was found as 29 kGy at dose rate of 1540 Gy/h. The non-irradiated PBEH was transparent, and the color changed to yellow with irradiation. Mechanical tests showed that PBEH has high radiation stability although there were some structural changes. It was seen that PBEH is a candidate polymer to be used in the immobilization of radioactive waste regarding radiation stability. |
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