摘要
以碳纳米管(CNTs)为增强填料,考察了CNTs用量对氢化丁腈橡胶(HNBR)混炼胶硫化特性及硫化胶物理机械性能、高温拉伸性能和耐老化性能的影响,并研究了CNTs增强HNBR硫化胶的动态力学性能和加工性能,表征了CNTs在橡胶中的分散状况。结果表明,随着CNTs用量的增加,HNBR混炼胶的硫化效率提高,且具有优异的抗硫化返原能力,HNBR硫化胶的拉伸强度变化不大,邵尔A硬度、100%定伸应力和撕裂强度逐渐提高,扯断伸长率和回弹性减小,高温扯断伸长率减小,高温拉伸强度和100%定伸应力提高;CNTs增强HNBR硫化胶老化后的拉伸强度无明显变化,邵尔A硬度和100%定伸应力提高,扯断伸长率减小。相比未增强HNBR硫化胶,CNTs增强HNBR硫化胶的弹性模量增大,损耗因子峰值减小,加工性能得到改善;CNTs在橡胶基体中整体分散比较均匀,局部存在团聚现象。
With carbon nanotubes （CNTs） as re- inforcer, the effects of CNTs amount on curing cha- racteristics of hydrogenated nitrile rubber （HNBR） compound and mechanical properties, tensile prop- erties at high temperature and aging resistance of HNBR vulcanizates were investigated. The dynamic mechanical properties and processing property of HNBR vulcanizates reinforced with CNTs were stu- died, and the dispersion of CNTs in rubber was characterized. The results showed that with the in- crease of CNTs amount, the curing efficiency of HNBR compounds was improved, HNBR compounds had excellent anti-reversion ability, the tensile strength of HNBR vulcanizates remain unchanged basically, Shore A hardness, modulus at 100% and tear strength increased, and elongation at break and resilience decreased. Elongation at break at high temperature decreased, and tensile strength and modulus at 100% at high temperature increased. The tensile strength of HNBR vulcanizates after aging had no obvious change, Shore A hardness and mod- ulus at 100% increased, and elongation at break de- creased. Compared with non-reinforced HNBR vul- canizates, the elastic modulus of HNBR vulcanizates reinforced with CNTs increaed, peak value of loss factor decreased, and the processing property was improved. The whole dispersion of CNTs in rubber matrix was uniform, but there was phenomenon of agglomeration in local.
出处
《合成橡胶工业》
CAS
CSCD
北大核心
2017年第3期202-206,共5页
China Synthetic Rubber Industry
关键词
碳纳米管
增强
氢化丁腈橡胶
物理机械性能
耐老化性能
动态力学性能
加工性能
carbon nanotube
reinforcement
hydrogenated nitrile rubber
mechanical property
aging resistance
dynamic mechanical property
pro-cessing property
