Tang Saifeng, Li Zhanxu, Sun Weichong, Liu Yangling, Wang Jian, Wang Xiong, Lin Jun
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China.
South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China.
Polymers (Basel). 2024 Jul 8;16(13):1945. doi: 10.3390/polym16131945.
Natural rubber (NR) composites have been widely applied in damping products to reduce harmful vibrations, while rubber with only a single composition barely meets performance requirements. In this study, rubber blend composites including various ratios of NR and styrene butadiene rubber (SBR) were prepared via the conventional mechanical blending method. The effects of the rubber components on the compression set, compression fatigue temperature rising and the thermal oxidative aging properties of the NR/SBR blend composites were investigated. Meanwhile, the dynamic mechanical thermal analyzer and rubber processing analyzer were used to characterize the dynamic viscoelasticity of the NR/SBR blend composites. It was shown that, with the increase in the SBR ratio, the vulcanization rate of the composites increased significantly, while the compression fatigue temperature rising of the composites decreased gradually from 47 °C (0% SBR ratio) to 31 °C (50% SBR ratio). The compression set of the composites remained at ~33% when the SBR ratio was no more than 20%, and increased gradually when the SBR ratio was more than 20%.
天然橡胶（NR）复合材料已广泛应用于减震产品中以减少有害振动，而单一成分的橡胶几乎无法满足性能要求。在本研究中，通过传统机械共混法制备了包含不同比例天然橡胶（NR）和丁苯橡胶（SBR）的橡胶共混复合材料。研究了橡胶组分对NR/SBR共混复合材料压缩永久变形、压缩疲劳温升及热氧老化性能的影响。同时，采用动态热机械分析仪和橡胶加工分析仪对NR/SBR共混复合材料的动态粘弹性进行了表征。结果表明，随着丁苯橡胶（SBR）比例的增加，复合材料的硫化速率显著提高，而复合材料的压缩疲劳温升从47℃（丁苯橡胶比例为0%）逐渐降至31℃（丁苯橡胶比例为50%）。当丁苯橡胶比例不超过20%时，复合材料的压缩永久变形保持在~33%，当丁苯橡胶比例超过20%时，压缩永久变形逐渐增加。
