The evolution of structure and proper-ties of natural rubber(NR)for vibration damping products during storage was studied by long-term storage method and accelerated aging method.The results showed that the hardness,modulus at 100％,modulus at 300％,storage modulus and loss modulus of NR vulcanizates increased gradually with increase of aging temperature and aging time,and the overall change trend was similar to that of crosslinking den-sity.The change rates of tensile strength and elonga-tion at break decreased while the loss factor decreased rapidly and tended to be stable.The ratio of dynamic stiffness and static stiffness decreased first and then increased slowly.Hot air aging had little effect on the vibration reduction performance of NR vulcanizates.
关键词
天然橡胶/空气弹簧/热氧老化/交联密度/硬度/动态力学性能/动静刚度比
Key words
natural rubber/air spring/thermal-oxidative aging/crosslinking density/hardness/dy-namic mechanical property/ratio of dynamic stiffness and static stiffness
维普
万方数据