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- Marconi, A, et al.
(författare)
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ERRATUM
- 2016
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Ingår i: Psychology, health & medicine. - 1465-3966. ; 21:6, s. VII-VII
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Tidskriftsartikel (refereegranskat)
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- Przybytniak, G., et al.
(författare)
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Inverse effect in simultaneous thermal and radiation aging of EVA insulation
- 2015
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Ingår i: Express Polymer Letters. - : Department of Polymer Engineering, Scientific Society of Mechanical Engineering. - 1788-618X. ; 9:4, s. 384-393
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Tidskriftsartikel (refereegranskat)abstract
- Poly(ethylene-co-vinyl acetate) (EVA) insulation of the cable applied in nuclear power plants was accelerated aged by gamma-rays at two various temperatures, namely 55 and 85 degrees C. Radiation degradation in the dose range of 01500 kGy was monitored using a Differential Scanning Calorimetry method by measuring oxidative induction temperature (OITp), gel fraction, mechanical and electrical tests. It was confirmed that a dose rate effect in the range of 420-1500 Gy/h was negligible whereas progress of degradation with increasing dose was strongly temperature dependent. For the insulation accelerated aged at 85 degrees C the OITp and permittivity measurements confirmed lower degradation than for the specimens radiation treated at 55 degrees C at the same dose rates. It was postulated that an inverse thermal effect resulted from radiation induced cross-linking facilitated by melting of EVA crystallites at 85 degrees C.
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