填料对过氧化物硫化氟橡胶性能的影响

Effect of Filler Systems on Properties of Fluororubber Vulcanized by Peroxide

研究了纳米无机填料体系对过氧化物硫化氟橡胶硫化特性、力学性能、热空气老化性能、热传导性能以及热稳定性能的影响,结果表明:与BaSO_4,BN和R930相比,三种不同结构形态的碳纳米材料明显延长了氟橡胶的正硫化时间;当硫化橡胶硬度级别相同时,多壁碳纳米管CNTs、石墨和N990对过氧化物硫化氟橡胶补强效果显著,其中CNTs的补强效率最高,添加CNTs可提高氟橡胶的撕裂强度,但严重损害其压缩永久变形性能;添加石墨和N990的氟橡胶可以获得更好的耐空气老化性能和耐高温压缩性能,添加R930耐高温压缩性能最好;石墨和BN有利于氟橡胶的导热性;添加BaSO_4的氟橡胶热失重分解温度最高,且质量损失率最小。

The effect of nano inorganic filler systems on curability,mechanical property,thermal aging property,thermal conductivity and thermal stability of peroxide vulcanization of fluororubber was investigated. The results show that T90 of fluororubbers is delayed with the addition of different morphology of carbon nano-materials compared with BaSO_4,BN and R930. The mechanical property and reinforcing efficiency of fluoroelastomer filled by CNTs,graphite and N990 are increased more than the others,when all the vulcanized rubbers possesse the same hardness. CNTs shows the best reinforcing efficiency. Inorganic filler CNTs can increase the tear strength,but it can also result in a higher compression set. Thermal aging property and compression set resistance of fluororubber filled with Graphite and N990 have better performance. Compression set of fluororubber is minimum with the addition of rutile type Ti O2（ R930）.Graphite and BN are benefit to thermal conductivity. Fluororubber with Ba SO4 possesses the highest decomposition temperature and the smallest mass loss.