Thermo-oxidative aging of epoxy coating systems
Article dans une revue avec comité de lecture
Auteur
ZAHRA, YahyaDJOUANI, FatmaKUNTZ, MVERDU, Jacques 
FAYOLLE, BrunoRésumé
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), respectively, cured by jeffamine (POPA) or polyamidoamine (PAA) were compared.Infrared spectrophotometry (IR), differential scanning (DSC) and sol–gel analysis (SGA) were used tomonitor structural changes.Thermal oxidation leads to carbonyl and amide formation in both systems. POPA systems appear moresensitive to oxidation than PAA ones. Thermal oxidation leads to predominant chain scission as evidencedby the decrease of glass transition temperatures (Tg) and increase of sol fraction.
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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; 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, 2012)
This work deals with a study of stabilizers loss by extraction in ethanol–cyclohexane mixtures simulating ethanol based biofuels. As theoretically predicted, cyclohexane has an extractive power considerably stronger than ...
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Article dans une revue avec comité de lecture; ;FAYOLLE, Bruno; RICHAUD, Emmanuel (Elsevier, 2011)
The thermal oxidation behaviour of polyethylene films stabilized by various weight ratios of organophosphites (Irgafos 168) has been studied at selected temperatures. The duration of the induction period was found to ...
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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 ...