Ageing and Durability of Organic Polymers
Chapitre d'ouvrage scientifique
Résumé
“Ageing” is any slow and irreversible phenomenon (under usage conditions) of a material’s structure, morphology or composition, under the effects of its own instability and/or interaction with the environment. Any condition is considered to be slow when the kinetics are not apprehensible in a time scale which is compatible with economic restraints. The classic approach of predicting long-term behavior consists of carrying out accelerated tests simulating, as accurately as possible, natural ageing and to presume that the hierarchy of stability for several materials is the same in accelerated and natural ageing. The modern approach consists of developing a kinetic model derived from analyzing degradation materials. Accelerated ageing is, then, used to identify the model parameters.
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Article dans une revue avec comité de lectureDJOUANI, Fatma; VERDU, Jacques; FLACONNECHE, Bruno; 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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Role of strain induced crystallization and oxidative crosslinking in fracture properties of rubbers Article dans une revue avec comité de lectureLE GAC, Pierre Yves; BROUDIN, Morgane; ROUX, Gérard; VERDU, Jacques; DAVIES, Peter; FAYOLLE, Bruno (Elsevier, 2014)Tensile properties and crack propagation properties, especially critical strain energy release rate in mode I, GIC, have been used to investigate fracture properties of elastomers and their relationships with microstructure. ...
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Article dans une revue avec comité de lectureCHEMINGUI, Mahmoud; VERDU, Jacques; FEROUANI, Abdel Karim; LEFEBVRE, Jean–Marc Marc R.; FAYOLLE, Bruno (Elsevier, 2011)Ageing of polymers results from structural modifications at the molecular scale and kinetic modelling must be elaborated from analysis of the phenomenon at this scale. However, the change of mechanical properties results ...
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Chapitre d'ouvrage scientifiqueNatural organic materials (wood, horn, skin, etc.) have been used since the dawn of humanity. Textile fabrication from vegetal fibers (linen, cotton, etc.) or from animals (silk, wool, etc.) reached an “industrial” stage ...
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Article dans une revue avec comité de lectureThe radiochemical degradation of a polyoxymethylene homopolymer (POM) was used to study the effects of molar mass changes in the crystalline structure. The dose rate was 20 kGy h -1 with doses of up to 30 kGy used. Both ...