Stress‐strain behavior of polychloroprene vulcanizates containing polymer‐gel particles

The equations of stress‐strain of gel‐filled polymer under large deformation were derived by using a simple model i.e. a sphere in a cubic matrix. The author finds for no adhesion between the phases:In case of perfect adhesion between the phases:where σ(α) is the stress of a blend at an elongation ratio of α, σ R (α) the stress of a rubber matrix at α, σ G (α G ) the stress of a gel component at α G , σ R (α R ) the stress of a rubber matrix at α R , ϕ the volume fraction of gel. The validity of Eq 1 was shown for the polychloroprene vulcanizates containing polystyrene‐gel which exhibits no adhesion with the polychloroprene matrix. This result shows the value of the model proposed here. The tensile strength of polychloroprene vulcanizates filled with polychloroprene‐gel at break is discussed by the use of Eqs 2–4 .