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采用机械共混法制备凹凸棒土(AT)/丁腈橡胶(NBR)纳米复合材料,研究了AT用量、偶联剂种类对复合材料硫化特性和力学性能的影响,并用透射电镜(TEM)和扫描电镜(SEM)观察了AT及其纳米复合材料的微观结构。结果表明,在机械剪切力的作用下,AT分离并分散在NBR中,形成纳米复合材料。随着AT用量的增加,AT/NBR的t10和t90缩短,硫化速度提高,硬度、拉伸强度、定伸应力和撕裂强度先增大后逐渐减小或不变;当AT用量为40份时,综合性能最好。偶联剂用量相同时,Si69改性效果最好,制得的AT/NBR综合力学性能与白炭黑、炭黑填充NBR性能相近。
The mechanical blending method was used to prepare attapulgite (AT) / nitrile rubber (NBR) nanocomposites. The effects of the amount of AT and coupling agent on the vulcanization and mechanical properties of the composites were investigated. Transmission electron microscope (TEM) The microstructure of AT and its nanocomposites was observed by scanning electron microscopy (SEM). The results show that AT is separated and dispersed in NBR under mechanical shearing force to form nanocomposites. With the increase of the amount of AT, the t10 and t90 of AT / NBR shortened, the vulcanization speed increased, and the hardness, tensile strength, set elongation and tear strength first increased and then decreased or remained unchanged. When the amount of AT was 40 When the best overall performance. When the amount of coupling agent is the same, the modification effect of Si69 is the best. The mechanical properties of AT / NBR obtained are similar to those of NBR filled with carbon black and carbon black.