Dispersion And Effects Of UFPCSBR/SiO₂ Nanocompound Powder On The Modification Of Rubber Composites

Using industrial techniques of irradiation vulcanization of rubber latex,preparation of pure silica slurry,slurry blending and spray drying,in this paper,we have successfully fabricated the ultrafine full-vulcanized carboxylated styrene butadiene rubber?UFPCSBR?/Si02 nanocompound powder.The UFPCSBR particles which have gradient crossingling structure and silica particles are isolated and adhered to each other.We blended UFPCSBR/SiO₂ nanocompound powder and SBR etc raw rubber,prepared rubber/UFPCSBR/SiO₂ ternary rubber nano-composites.We have studied the dispersion of the UFPCSBR/SiO₂ compound powder in the rubber matrix and the influence of it on the properties of the rubber nano-composites.The experimental results showed that the hydrophilic silica dispersed well in the SBR/NR,SBR/BR matrixes in the process of UFPCSBR/SiO₂ compound powder and raw rubber blending.This is because that having been irradiated by ? ray and electron beam,the rubber particles in carboxylated styrene butadiene latex had high crosslinking degree on the surface and moderate crosslinking degree in the inner parts,which have good mobility after spray drying.The UFPCSBR particles which possess good compatibility with SBR can disperse well in the rubber matrix when they were blending with rubber,so that the SiO₂ particles which are isolated and adhered with the UFPCSBR particles can disperse well in rubber matrix,and prepare the rubber/UFPCSBR/SiO₂ nanocomposites which the UFPCSBR particles and the SiO₂ particles can disperse well in them.Noteworthily,different from the rubber/UFPCSBR/SiO₂ ternary composites prepared with adding the UFPCSBR powdrt and SiO₂ powder respectively,there is a side peak on the tand-T curve of the rubber/UFPCSBR/SiO₂ ternary composites by adding the UFPCSBR/SiO₂ compound powder in the temperature range of 20 tO 40?.The appearance of side peak will provide a new approach for the development of green tyre tread.In addition,the novel rubber/UFPCSBR/SiO₂ ternary nanocomposites prepared using the UFPCSBR/SiO₂ compound powder has higher tensile strength,lower heat built-up and good abrasion resistance.