The effect of organomodified montmorillonite (MMT) content and mixing conditions on the mechanical properties, structure, and morphology of a chloroprene rubber was investigated. Nanoparticles were mechanically mixed with a plasticizer, followed by ultrasonic homogenization before compounding of all ingredients of the mixtures in two-roll mills. Mechanical tests were carried out on samples prepared with three sonication amplitudes and containing different amounts of montmorillonite. The tensile strength and energy to break were found to increase by 15 and 70%, respectively, at the highest nanoclay content but the crack growth rate and tearing energy decreased. Variations in the mixing amplitude and MMT content did not influence the DSC and TGA thermograms, confirming an unchanged thermal stability of the nanocomposites. The highest sonication amplitude led to rubber mixtures with more uniform and homogeneous morphologies, with clay nanoparticles well dispersed and embedded in the rubber matrix.

研究了有机改性蒙脱石 (MMT) 含量和混合条件对氯丁橡胶的机械性能、结构和形貌的影响。将纳米颗粒与增塑剂机械混合，然后在两辊磨机中混合所有混合物成分之前进行超声均化。对用三种超声振幅制备并含有不同量蒙脱石的样品进行机械测试。发现在最高纳米粘土含量下，拉伸强度和断裂能分别增加 15% 和 70%，但裂纹扩展速率和撕裂能降低。混合幅度和 MMT 含量的变化不影响 DSC 和 TGA 热分析图，证实了纳米复合材料的热稳定性不变。