The application of rubber modifier isophthalic hydrazide(IDH)in natural rubber(NR)damping materials for passenger cars was studied.The results showed that,compared with the NR compound without IDH,the Mooney viscosity of the NR compound with IDH increased,t10 and t90 were shortened,physical properties of NR vulcanizate with IDH had no significant change and the fatigue life was extended.In both carbon black-filled NR system and NR/trans-butadiene rubber blended system,the aging resistance of the vulcanizate was improved after adding IDH.In the carbon black-filled NR system,the dynamic and static stiffness ratio of the vulcanizate significantly decreased after adding IDH.
rubber modifierNRcarbon blackdynamic and static stiffness ratioaging resistance
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