Thermal aging of electrical cable insulation made of cross‐linked low density polyethylene for under‐hood application in automotive industry
Article dans une revue avec comité de lecture
The thermal aging of two electrical cable insulations made of cross-linked low density polyethylene (XLPE) only differing by their stabilization system was studied in air between 125 and 200°C. The chemical consumption of the two types of antioxidants (phenol and sulfide), the build-up of oxidation products and the consequences of thermal oxidation on the mechanical properties were respectively determined by measurement of the oxidation induction time (OIT), Fourier transform infrared spectroscopy (FTIR) and uniaxial tensile testing. It was found that the chemical consumption of each antioxidant occurs in turn almost independently, starting with the sulfide antioxidant and involving small but well detectable antagonistic effects. As soon as the antioxidant concentration becomes very low, that is, practically undetectable by OIT measurements, the thermal oxidation of XLPE is detected by FTIR spectroscopy causing a catastrophic decrease in the fracture properties. It was shown that the complete consumption of antioxidants coincides with the end of the oxidation induction period and the onset of the sudden decrease in the elongation at break. Based on all these experimental results, a simplified kinetic model was developed to account as faithfully as possible for the consumption kinetics of antioxidants, evaluate their antagonistic effects and, using a relevant end-of-life criterion, predict the lifetime of the two XLPE insulations. It was found a satisfying agreement between theory and experiment.
Files in this item
Showing items related by title, author, creator and subject.
3D quasi-automatic spine length assessment using low dose biplanar radiography after surgical correction in thoracic idiopathic scoliosis Article dans une revue avec comité de lectureLANGLAIS, T; VERGARI, Claudio; XAVIER, F; AL HAWSAWI, M; GAJNY, Laurent; VIALLE, Raphaël; SKALLI, Wafa; PIETTON, Raphaël (Elsevier BV, 2022)Background: As a leading cause of disability with a high societal and economic cost, it is crucial to better understand risk factors of neck pain and surgical complications. Getting subject-specific external loading is ...
Micromachine d'essais mécaniques de type traction et compression ayant une accessibilité optimisée BrevetPESCI, Raphaël; BOMONT, Olivier; WARY, Marc; BIANCHIN, Jeremy; SIMON, Lionel; BOEHM, Daniel; HECKER, Jean-Michel; PEIFFERT, Xavier (2015)L'invention concerne une micromachine de traction destinée à être utilisée dans une enceinte de microscope électronique à balayage ou avec un appareil de diffraction, comportant deux mors (1) portés par deux supports, ...
Biplanar stereoradiography predicts pulmonary function tests in adolescent idiopathic scoliosis: a cross-sectional study Article dans une revue avec comité de lectureBOULOUSSA, Houssam; VERGARI, Claudio; HAEN, Thomas-Xavier; SKALLI, Wafa; VIALLE, Raphaël (Springer Verlag, 2019)Purpose Various spinal and rib cage parameters measured from complex examinations were found to be correlated with preoperative pulmonary function tests (PFT). The aim was to investigate the relationship between preoperative ...
A Nano-Dose Protocol For Cobb Angle Assessment in Children With Scoliosis: Results of a Phantom-based and Clinically Validated Study Article dans une revue avec comité de lecturePEDERSEN, Peter H.; VERGARI, Claudio; TRAN, Alexia; XAVIER, Fred; JAEGER, Antoine; LABOUDIE, Pierre; HOUSSET, Victor; EISKJAER, Soren; VIALLE, Raphaël (2019)STUDY DESIGN: This was a prospective validation study with technical notes. OBJECTIVE: This study aimed to validate a new ultra-low-dose full-spine protocol for reproducible Cobb angle measurements-the "nano-dose" protocol. ...
Article dans une revue avec comité de lecturePolyethylene is a widely used polymer and a prototypical polyolefin. Understanding degradation mechanisms at the atomic scale leading to oxidation under the effect of temperature and/or irradiation is crucial for many ...