Radiochemical ageing of epoxy coating for nuclear plants
Article dans une revue avec comité de lecture
Auteur
QUEIROZ, D. P.R.FRAÏSSE, FrédéricKUNTZ, MatthiasVERDU, Jacques 
FAYOLLE, BrunoRésumé
The degradation of an epoxy-amine network exposed to gamma irradiation in oxygen atmosphere has been studied by using a variety of analytical methods, including infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and sol-gel analysis. Results show that the oxidation of epoxy systems grows with the irradiation dose. Hydroperoxides, which are species resulting from oxidation, were identified and quantified by DSC. As indicated by the sol-gel analysis, the mechanism of degradation of chain scission seems to be predominant over crosslinking. The modifications induced by irradiation reflect in a greater capacity of water absorption.
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Article dans une revue avec comité de lecture; ; ; ;FAYOLLE, Bruno (Elsevier, 2014)
Epoxy networks based on Diglycidyl ether of bisphenol A (DGEBA) and cured with Jeffamines (POPA) or polyamidoamine (PAA) were gamma irradiated at 25 1C in air. Dose rates of 50, 200 or 2000 Gy h- 1 for doses up 100 kGy ...
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Article dans une revue avec comité de lecture; ; ; ;FAYOLLE, Bruno (Elsevier, 2014)
tThe thermo-oxidative behavior of unformulated (unfilled) samples of epoxy coatings has been studiedat five temperatures ranging from 70◦C to 150◦C. Two epoxy networks based on diglycidyl ether ofbisphenol A (DGEBA), ...
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Article dans une revue avec comité de lecture; ; ;FAYOLLE, Bruno (Elsevier, 2010)
Degradation induced by thermal (50-110 °C) and radio-oxidation of low T g epoxy-amine networks has been studied. It has been found that oxidation leads mainly to amide groups formation at the vicinity of tertiary amines ...
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Article dans une revue avec comité de lecture; ; ;FAYOLLE, Bruno; RICHAUD, Emmanuel (Institut Français du Pétrole, 2015)
This paper deals with polymer-fuel interaction focusing on specific effects of biofuels on polyethylene (PE) in automotive applications. The practical objective is to develop a predictable approach for durability of ...
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Article dans une revue avec comité de lecture; ; ; ;FAYOLLE, Bruno; RICHAUD, Emmanuel (Elsevier, 2015)
The oxidation kinetics of unstabilized polyamide 11 thin film under oxygen pressures up to 2.0 MPa was studied by means of ferrous ion method for hydroperoxides titration, size exclusion chromatography (SEC) for molar weight ...