Relationship between macromolecular network and fatigue properties of unfilled polychloroprene rubber

Type Article
Date 2021-10
Language English
Author(s) Le Gac Pierre YvesORCID1, Albouy Pierre-Antoine2, Fayolle Bruno3, Verdu Jacques3
Affiliation(s) 1 : IFREMER Centre de Bretagne, Marine Structures Laboratory, BP70, 29280 Plouzané, France
2 : Laboratoire de Physique des Solides, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405 Orsay, France
3 : PIMM, Arts et Metiers Institute of Technology, CNRS, Cnam, HESAM University, 151 boulevard de l'Hopital, 75013 Paris, France
Source Polymer Degradation And Stability (0141-3910) (Elsevier BV), 2021-10 , Vol. 192 , P. 109669 (8p.)
DOI 10.1016/j.polymdegradstab.2021.109669
WOS© Times Cited 5
Keyword(s) Fatigue, Polychloroprene rubber, Network changes

Fatigue life of unfilled polychloroprene rubber is characterized in fully relaxing (R=0) and non-relaxing conditions (R=0.2) for more than 15 network structures. Network changes are induced by thermal oxidation ageing of the rubber and characterized especially in terms of crosslink density. For the first time, in the case of unfilled elastomers, we show that an increase in crosslink density leads to a decrease in fatigue life, which cannot be attributed to large changes in strain-induced crystallization processes. The results obtained here are used to determine the relationship between network structure and fatigue properties. In fully relaxing conditions, it is possible to predict fatigue lifetime by considering crosslink density using a theoretical energetic approach. Nevertheless, the same approach does not work in non-relaxing conditions. In the latter case, a new empirical relationship is proposed to link fatigue life to the crosslink density of rubber.

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