The fatigue ageing of vulcanised rubbers

  • Jeffrey P. Molyneux

Student thesis: Doctoral ThesisDoctor of Philosophy


The cause of the respective rough and smooth fatigue failure surfaces of Neoprene GS : Neoprene W and Neoprene GS : natural rubber vulcanisates is investigated. The contrasting morphology of the vulcanisates is found to be the major factor determining the fatigue behaviour of the blends.
Neoprene GS and Neoprene W appear to form homogeneous blends which exhibit physical properties and fatigue failure surfaces intermediate between those of the two horropolymers.
Neoprene GS and natural rubber exhibit heterogeneity when blended
together. The morphology of these blends is found to influence both the fatigue resistance and failure surface of the vulcanisates. Exceptional uncut and cut initiated fatigue lives are observed for blends having an interconnecting network morphology.
The network structure and cross-link density of the elastomers in the blends and the addition of carbon black and antioxidant are all found to influence the fatigue resistance but not the failure mechanism of the vulcanisate.
Date of AwardJul 1981
Original languageEnglish


  • fatigue
  • blends
  • network structure
  • chlorprene rubber
  • natural rubber

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