TY - JOUR T1 - Polychloroprene behaviour in a marine environment: Role of silica fillers A1 - Tchalla,Siwavi Tatiana A1 - Le Gac,Pierre-Yves A1 - Maurin,R. A1 - Creac'Hcadec,R. AD - IFREMER, Serv Mat & Struct, Ctr Brest BP70, F-29280 Plouzane, France. AD - ENSTA Bretagne, FRE CNRS 3744, Inst Rech Dupuy de Lome, F-29200 Brest, France. AD - EDF R&D, Mat & Mech Components Div, Grp T28, EDF Lab Renardieres, Ave Renardieres, F-77818 Moret Sur Loing, France. UR - https://doi.org/10.1016/j.polymdegradstab.2017.03.011 DO - 10.1016/j.polymdegradstab.2017.03.011 KW - Polychloroprene KW - Seawater KW - Silica filler KW - Hydrolysis N2 - Polychloroprene rubbers are widely used in marine structures and often filled with silica in order to increase mechanical properties. The presence of silica fillers leads to a complex degradation of the material. This study aims to understand the deeper degradation mechanisms involved when a silica filled polychloroprene is used in sea water. To do so, 4 polychloroprene rubbers filled with different amounts of silica (from 0 to 45 phr) were aged in natural sea water for 6 months at temperatures ranging from 25 to 60 °C. Moreover, a natural rubber with similar formulation was also considered in order to evaluate the role of the chlorine atom in the degradation. . The chemistry and mechanics of the rubber degradation were also studied. In the presence of water and silica fillers, a large decrease in rubber stiffness was observed. This was attributed to the breakage of hydrogen bonds involved in the interaction between the silica and chloroprene matrix and the process is reversible. In the meantime, silica undergoes hydrolysis that leads to silanol formation and so an increase in rubber stiffness when water is removed; this process is irreversible. Y1 - 2017/05 PB - Elsevier Sci Ltd JF - Polymer Degradation And Stability SN - 0141-3910 VL - 139 SP - 28 EP - 37 ID - 48689 ER -