Oxidative Ageing of Polymers
This book aims to rehabilitate kinetic modeling in the domain of polymer ageing, where it has been almost abandoned by the research community. Kinetic modeling is a key step for lifetime prediction, a crucial problem in many industrial domains in which needs cannot be satisfied by the common empirical methods. The book proposes a renewed approach of lifetime prediction in polymer oxidative ageing. This approach is based on kinetic models built from relatively simple mechanistic schemes but integrating physical processes (oxygen diffusion and stabilizer transport), and use property (for instance mechanical failure) changes. An important chapter is dedicated to radiation-induced oxidation and its most important applications: radiochemical ageing at low dose rates and photo-chemical ageing under solar radiation. There is also a chapter devoted to the problem of ageing under coupled oxidation and mechanical loading. (Extract from the web site of the publisher)
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Thermo-oxidation behaviour of composite materials at high temperatures: A review of research activities carried out within the COMEDI program LAFARIE, Marie Christine; GRANDIDIER, Jean Claude; OLIVIER, Loic; COLIN, Xavier; VERDU, Jacques; CINQUIN, Jacques (Elsevier, 2010)The present paper presents a review of the main activities carried out within the context of the COMEDI research program, a joint collaboration involving three research teams focusing on the thermo-oxidation behaviour of ...
Plastisol Foaming Process. Decomposition of the Foaming Agent, Polymer Behavior in the Corresponding Temperature Range and Resulting Foam Properties VERDU, Jacques; ZOLLER, Agnes; MARCILLA, Antonio (WILEY, 2013)The decomposition of azodicarbonamide, used as foaming agent in PVC - plasticizer (1/1) plastisols was studied by DSC. Nineteen different plasticizers, all belonging to the ester family, two being polymeric (polyadipates), ...
DJOUANI, Fatma; ZAHRA, Yahya; FAYOLLE, Bruno; KUNTZ, M; VERDU, Jacques (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 ...
GILORMINI, Pierre; RICHAUD, Emmanuel; VERDU, Jacques (Elsevier, 2017)Methyl methacrylate-ethylene glycol dimethacrylate networks were synthetized and submitted to radiochemical degradation, with ageing monitored by means of sol-gel analysis. The networks were shown to undergo chain scission ...
GILORMINI, Pierre; VERDU, Jacques (2018)A kinetic model is proposed for the absorption of water in polymers. The process of bonding-debonding water molecules is described by two opposite reactions with different rate constants, and the key role of the concentration ...