环氧化天然橡胶改性石墨烯-炭黑/天然橡胶复合材料的制备及性能

以环氧化天然橡胶(ENR)为界面改性剂，制备了石墨烯-炭黑/天然橡胶-ENR(GR-CB/NR-ENR)复合材料，研究了ENR用量对GR-CB/NR-ENR复合材料的加工性能、力学性能和动态力学性能的影响。结果表明，ENR的加入可以改善GR-CB/NR-ENR复合材料的加工性能及CB粒子在天然橡胶基体中的分散性，增加GR与NR的相容性，增强填料与NR基体间的界面相容性，同时改善GR-CB/NR-ENR硫化胶的动态力学性能、物理性能和耐老化性能。当ENR添加量为6 wt%时，GR-CB/NR-ENR复合材料撕裂强度和拉伸强度最高，硫化胶耐老化性最好。随着ENR含量的增加，GR-CB/NR-ENR复合材料的压缩疲劳温度先升高后降低；随着应变的不断增大，GR-CB/NR-ENR复合材料的储能模量G'不断减小，损耗因子tanδ先增大后减小；动态模量随着应变的增加急剧下降。 

Preparation and properties of epoxidized natural rubber modified graphene-carbon black/natural rubber composites

The epoxidized natural rubber(ENR) was an interfacial modifier for the preparation of graphene-carbon black/natural rubber-ENR(GR-CB/NR-ENR) composites. The effects of ENR dosage on the processing properties, mechanical properties and dynamic mechanical properties of GR-CB/NR-ENR composites were studied. The results show that the addition of ENR can improve the processing properties of GR-CB/NR-ENR composites and the dispersion of CB particles in NR matrix. Increasing the compatibility of GR with NR, the interfacial compatibility between the filler and the NR matrix is enhanced, the dynamic mechanical properties, physical properties and aging resistance are improved. When 6 wt% ENR is added, the GR-CB/NR-ENR composite has the highest tear strength and tensile strength, and the GR-CB/NR-ENR vulcanized rubber has the best aging resistance. As the ENR content increases, the compression fatigue temperature of the GR-CB/NR-ENR composite increases first and then decreases; As the strain increases, the storage modulus G' of the GR-CB/NR-ENR composite decreases continuously, and the loss factor tanδ shows a phenomenon of increasing first and then decreasing, while the dynamic modulus drops sharply with increasing strain.