摘要
采用长期储存和加速老化相结合的方法对减振制品用天然橡胶(NR)在存储过程中结构与性能的演变进行研究。结果表明,随着老化温度的升高和老化时间的延长,NR硫化胶的硬度、100%定伸应力、300%定伸应力、储能模量和损耗模量均逐渐增大且总体变化趋势与交联密度的变化趋势相近,拉伸强度和扯断伸长率的变化率均呈现整体下降趋势,而损耗因子则迅速降低并趋于稳定,动静刚度比呈现先降低后缓慢上升的趋势;热空气老化对NR硫化胶减振性能的影响较小。
The evolution of structure and properties 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 density.The change rates of tensile strength and elongation 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.
作者
刘治澳
赵庆镇
马春临
李培军
LIU Zhi-ao;ZHAO Qing-zhen;MA Chun-lin;LI Pei-jun(School of Polymer Science and Engineering/Key Laboratory of Rubber-Plastics of Ministry of Education,Qingdao University of Science and Technology,Qingdao 266042,China)
出处
《合成橡胶工业》
CAS
2024年第2期153-159,共7页
China Synthetic Rubber Industry
基金
国家重点研究计划项目(2108 YFC 1902600)。
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
natural rubber
air spring
thermal-oxidative aging
crosslinking density
hardness
dynamic mechanical property
ratio of dynamic stiffness and static stiffness
