Origin of epoxies embrittlement during oxidative ageing
Article dans une revue avec comité de lecture
Date
2017Journal
Polymer TestingAbstract
Thermal oxidation of three epoxy resins prepared from flexible or rigid prepolymers and hardeners was studied by monitoring epoxy mechanical and physical changes. The physical changes were followed by mass measurements, glass transition temperature using DSC and sub-glass β transition using DMA. It was put in evidence that embrittlement is not directly associated to Tg or mass loss changes since epoxy network based on isophorone diamine (IPDA) hardeners were shown to undergo mainly a chain scission at the beginning of exposure process whereas epoxy network based on trioxatridecane diamine (TTDA) hardeners exhibits a crosslinking process with a significant mass loss. The only common feature for both epoxy systems to understand embrittlement is the drop of amplitude of β transition with oxidation.
Files in this item
Related items
Showing items related by title, author, creator and subject.
-
Article dans une revue avec comité de lectureERNAULT, Esteve; RICHAUD, Emmanuel; FAYOLLE, Bruno (Elsevier, 2016)This work reports the thermal oxidation of DGEBA resins totally cured with cycloaliphatic (isophorone diamine) or with linear aliphatic (trioxa-tridecanediamine or TTDA) diamine hardener. Chemical changes (carbonyl build-up) ...
-
Article dans une revue avec comité de lectureERNAULT, Esteve; RICHAUD, Emmanuel; FAYOLLE, Bruno (Elsevier, 2017)Thermal oxidation of three epoxy resins differing by the nature of prepolymer (bisphenol A diglycidyl ether and 1,4-butanediol diglycidyl ether) and hardener (isophorone diamine and 4,7,10-Trioxa-1,13-tridecanediamine) was ...
-
Article dans une revue avec comité de lectureERNAULT, Esteve; DIRRENBERGER, Justin; RICHAUD, Emmanuel; FAYOLLE, Bruno (Elsevier, 2019)A methodology to predict the formation of superficial stress during the diffusion-limited oxidation of thick epoxy/amine samples is proposed. This quantitative methodology is based on the understanding of mechanisms ...
-
Article dans une revue avec comité de lectureRICHAUD, Emmanuel; DJOUANI, Fatma; FAYOLLE, Bruno; VERDU, Jacques; FLACONNECHE, Bruno (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 ...
-
Article dans une revue avec comité de lectureOKAMBA-DIOGO, Octavie; RICHAUD, Emmanuel; VERDU, Jacques; FERNAGUT, François; GUILMENT, Jean; FAYOLLE, Bruno (Elsevier, 2014)The present article reports a study of thermal oxidation of unstabilized polyamide 11 films at several temperatures (90–165 °C) under atmospheric pressure and under various oxygen pressures (up to 1.6 MPa) at 110 °C. The ...