13th International Conference on Fracture June 16–21, 2013, Beijing, China -3- strength and stretch to fracture, and the more pronounced increase in initial elastic modulus. Fig.3 Tensile stress-stretch curves of filled rubber with 5 vol% and 15 vol% CB, aged at 120oC Fig.4 Variation of tensile strength with aging time for CB filled rubbers aged at 120oC Fig.5 Variation of stretch to fracture with aging time for CB filled rubbers aged at 120oC Fig.6 Variation of initial elastic modulus with aging time for CB filled rubbers aged at 120oC Fig.7 Variation of tensile strength with aging time for 15 vol% CB filled rubbers aged at 120oC and at 70oC
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