Study On The Properties Of CNTs/Rubber Composites

The CNTs is one of the most promising carbon materials due to the excellent performances of CNTs.The CNTs is widely used as fillers in polymers.But the filling effect did not give full play of the advantages of CNTs,owing to the agglomerations and low surface energy.Therefore,CNTs are often used with other fillers as hybrid fillers and each filler's advantages be brought into play.Synergistic effect of the hybrid fillers is popular in recent years.First of all,the process of the experiment should be explored when CNTs was added in the original formula of the composites.So,two different orders of CNTs' addition and the times of mill run were studied in the paper.Processing performance,mechanical properties,abrasion resistance and thermal conductivity of the composites were measured.As a result,adding CNTs after CB and 10 times for mill run were the most appropriate process.Four different kinds of CNTs with different length-diameter ratios were adopted in this paper.The moony viscosity,the cure characteristics,abrasion resistance and mechanical properties were measured.The CNTs of GT-300 with the biggest length-diameter ratio possess a good reinforcing effect.CNTs and CB were added in the rubber as hybrid fillers and the amount of two were studied.3D measuring laser microscopy could be used to measure the surface roughness and shoot three-dimensional height map,which can help us to analyze the wear resistance and tensile properties of rubber.CB was replaced partially by CNTs according to different ratios,the mechanical properties and thermal conductivity were optimal with the ratio 1:1.The wear-resisting property of the rubber is the best with the ratio 1:2.5.The synergistic effect of CNTs and CB can improve the performance of the composites.