Durability changes of epoxy resins under action of protons and gamma rays

Романов, В. А.; Khorasanov, G.L.; Константинов, И. О.; Smolyanskiĭ, A. S.; Klinshpont, E.R.; Tupikov, V.I.; Milinchuk, V.K.

doi:10.1016/0969-806x(95)00279-7

Cited by 7 publications

(1 citation statement)

References 2 publications

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“…The durability of products based on γ-irradiated epoxy resins is determined according to the received doses and dose rates. The high values of these technological parameters are essential factors that characterize the oxidation strength and the integrity of the items [72]. The consequences of irradiation processing are tightly related to the implication of filler particles that are able to withdraw free radicals from the degradation chain.…”

Section: Discussionmentioning

confidence: 99%

Stability Qualification of Resins/Metallic Oxide Composites for Surface Oxidative Protection

Zaharescu,

Mirea,

Borbath

et al. 2024

Polymers

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The accelerated degradation of alkyd resins via γ-irradiation is investigated using non-isothermal chemiluminescence. The stability qualification is possible through the comparison of emission intensities on a temperature range starting from 100 °C up to 250 °C under accelerated degradation caused by radiolysis scission. The measurements achieved in the samples of cured state resin modified by various inorganic oxides reveal the influence of metallic traces on the aging amplitude, when the thermal resistance increases as the irradiation dose is augmented. Even though the unirradiated samples present a prominent chemiluminescence intensity peak at 80 °C, the γ-processed specimens show less intense spectra under the pristine materials and the oxidation starts smoothly after 75 °C. The values of activation energies required for oxidative degradation of the sample subjected to 100 kGy are significantly higher in the composite states than in the neat resin. The degradation mechanism of polymerized resins is discussed taking into account the effects of fillers on the stability of studied epoxy resin at various temperatures when the degradation and crosslinking are in competition for the decay of free radical.

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Section: Discussionmentioning

confidence: 99%