Preparation And Investigation Of Properties In Graphenen Oxide/Natural Rubber Composites

The GO/NR composites were prepared by mechanical blending method, and the effect of mixing technological conditions and GO content on cure characteristics, physical mechanical properties and dynamic mechanical properties was investigated, including the effect of GO content on heat-conducting property and dielectric property of GO/NR composites. The results showed that the integrated mechanical property was the best, when the rotation speed, the initial mixing temperature and the mixing time were 50r/min,60? and 10min respectively. The tensile strength of GO/NR was the highest, when the GO content was 0.5 phr. The storage modulus increased and the loss factor increased with increase of GO content, and the heat-conducting property increased slightly, but it was not obvious enough, meanwhile, the dielectric property increased to some degree.GO/CB/NR and GO/CNT/NR composites were prepared by mechanical blending method with different ratios between GO and CB, as well as GO and CNT. The physical mechanical properties, dynamic mechanical properties and heat-conducting property were investigated. The results showed that for GO/CB/NR composites, the max torque, curing time,300% strength, tear strength, and hardness increased, however, the scorch time and elongation at break of samples decreased with increase of carbon black content, when the GO content was 0.5phr constant. The max torque increased first and then decreased with increase of GO content, when the carbon black content was 30phr constant. It reached the maximum, when the GO content was 0.25phr. The effect of changing carbon black content on stress-strain behavior was more than that of changing GO content on it. The GO/CB/NR composites, which contained 0.5phr GO and 30phr carbon black, possessed the best combination property.The max torque, loss factor, and the storage modulus of relevant vulcanizates decreased, however, the curing time and storage modulus of compound increased with increase of GO content in CNT/GO blend for GO/CB/NR composites. The 300% strength and tear strength increased, when the GO content was 0.5phr, however, the physical mechanical properties decreased with further increase of GO content. The glass transition temperature of GO/CNT/NR composite decreased, comparing with the CNT/NR composite. The heat-conducting coefficient of GO/CNT/NR was much higher than that of GO/NR composite, when the GO content was the same in the both composites.The GO/NR composites were prepared by solution method with different GO contents, and the effect of GO content on dynamic mechanical properties was investigated. The results showed that the stackable structure of GO was formed, when the GO content was nearby 1.0phr. The storage modulus at low strain increased with increase of sweep times, when the GO content was low. When the GO content was 1.2phr, the storage modulus increased with increase of sweep times except for the first time, however, the Payne effect was the highest for the first time strain sweep, and then it decreased.