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, Conclusions and prospects

, Field-joint en milieu marine, sa prévision de durée de vie sera divisée en deux parties à étudier: l'oxydation thermique et le lien avec les propriétés techniques (mécanique, interaction avec l'eau)

C. Dans-ce, pour l'exploitation pétrolière en mer et plus généralement pour le vieillissement dans l'eau. En service, le matériau PDCPD est soumis à de l'eau de mer et à un profil de température en fonction de l'épaisseur du revêtement. Ainsi, l'oxydation thermique du PDCPD influencera potentiellement le comportement d'absorption d'eau. L'objectif de ce chapitre est d'étudier les propriétés de, nous nous focaliserons sur l'application potentielle du PDCPD en tant que « Field Joint

, µm) de PDCPD sans stabilisants, présentant une humidité relative (HR) comprise entre 10 et 90% à trois températures, à l'aide d'un appareil DVS. Les échantillons de PDCPD ont tout d'abord été oxydés à 25°C, 50°C et 70°C pour différentes durées de vieillissement. Ensuite, des échantillons non vieillis et des échantillons oxydés ont été prélevés pour mener des expériences de sorption d, Des expériences de sorption d'eau ont été réalisées sur des films minces

L. Figure and A. , 28 présente la courbe typique de changement de masse pour le PDCPD non vieilli

, Il est clair que l'absorption maximale d'eau dans le matériau non vieilli est très faible (généralement inférieure à 0,3%) à cause de sa structure apolaire